[RFC PATCH 01/37] mmap locking API: mmap_lock_is_contended returns a bool

[RFC PATCH 01/37] mmap locking API: mmap_lock_is_contended returns a bool

[Michel Lespinasse]

Change mmap_lock_is_contended to return a bool value, rather than an
int which the callers are then supposed to interpret as a bool. This
is to ensure consistency with other mmap lock API functions (such as
the trylock functions).

Signed-off-by: Michel Lespinasse <michel@lespinasse.org>
---
 include/linux/mmap_lock.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/linux/mmap_lock.h b/include/linux/mmap_lock.h
index 0540f0156f58..4e27f755766b 100644
--- a/include/linux/mmap_lock.h
+++ b/include/linux/mmap_lock.h
@@ -171,9 +171,9 @@ static inline void mmap_assert_write_locked(struct mm_struct *mm)
 	VM_BUG_ON_MM(!rwsem_is_locked(&mm->mmap_lock), mm);
 }
 
-static inline int mmap_lock_is_contended(struct mm_struct *mm)
+static inline bool mmap_lock_is_contended(struct mm_struct *mm)
 {
-	return rwsem_is_contended(&mm->mmap_lock);
+	return rwsem_is_contended(&mm->mmap_lock) != 0;
 }
 
 #endif /* _LINUX_MMAP_LOCK_H */
-- 
2.20.1

[RFC PATCH 02/37] mmap locking API: name the return values

[Michel Lespinasse]

In the mmap locking API, the *_killable() functions return an error
(or 0 on success), and the *_trylock() functions return a boolean
(true on success).

Rename the return values "int error" and "bool ok", respectively,
rather than using "ret" for both cases which I find less readable.

Signed-off-by: Michel Lespinasse <michel@lespinasse.org>
---
 include/linux/mmap_lock.h | 32 ++++++++++++++++----------------
 1 file changed, 16 insertions(+), 16 deletions(-)

diff --git a/include/linux/mmap_lock.h b/include/linux/mmap_lock.h
index 4e27f755766b..8ff276a7560e 100644
--- a/include/linux/mmap_lock.h
+++ b/include/linux/mmap_lock.h
@@ -81,22 +81,22 @@ static inline void mmap_write_lock_nested(struct mm_struct *mm, int subclass)
 
 static inline int mmap_write_lock_killable(struct mm_struct *mm)
 {
-	int ret;
+	int error;
 
 	__mmap_lock_trace_start_locking(mm, true);
-	ret = down_write_killable(&mm->mmap_lock);
-	__mmap_lock_trace_acquire_returned(mm, true, ret == 0);
-	return ret;
+	error = down_write_killable(&mm->mmap_lock);
+	__mmap_lock_trace_acquire_returned(mm, true, !error);
+	return error;
 }
 
 static inline bool mmap_write_trylock(struct mm_struct *mm)
 {
-	bool ret;
+	bool ok;
 
 	__mmap_lock_trace_start_locking(mm, true);
-	ret = down_write_trylock(&mm->mmap_lock) != 0;
-	__mmap_lock_trace_acquire_returned(mm, true, ret);
-	return ret;
+	ok = down_write_trylock(&mm->mmap_lock) != 0;
+	__mmap_lock_trace_acquire_returned(mm, true, ok);
+	return ok;
 }
 
 static inline void mmap_write_unlock(struct mm_struct *mm)
@@ -120,22 +120,22 @@ static inline void mmap_read_lock(struct mm_struct *mm)
 
 static inline int mmap_read_lock_killable(struct mm_struct *mm)
 {
-	int ret;
+	int error;
 
 	__mmap_lock_trace_start_locking(mm, false);
-	ret = down_read_killable(&mm->mmap_lock);
-	__mmap_lock_trace_acquire_returned(mm, false, ret == 0);
-	return ret;
+	error = down_read_killable(&mm->mmap_lock);
+	__mmap_lock_trace_acquire_returned(mm, false, !error);
+	return error;
 }
 
 static inline bool mmap_read_trylock(struct mm_struct *mm)
 {
-	bool ret;
+	bool ok;
 
 	__mmap_lock_trace_start_locking(mm, false);
-	ret = down_read_trylock(&mm->mmap_lock) != 0;
-	__mmap_lock_trace_acquire_returned(mm, false, ret);
-	return ret;
+	ok = down_read_trylock(&mm->mmap_lock) != 0;
+	__mmap_lock_trace_acquire_returned(mm, false, ok);
+	return ok;
 }
 
 static inline void mmap_read_unlock(struct mm_struct *mm)
-- 
2.20.1

[RFC PATCH 03/37] do_anonymous_page: use update_mmu_tlb()

[Michel Lespinasse]

update_mmu_tlb() can be used instead of update_mmu_cache() when the
page fault handler detects that it lost the race to another page fault.

Signed-off-by: Michel Lespinasse <michel@lespinasse.org>
---
 mm/memory.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/memory.c b/mm/memory.c
index 5efa07fb6cdc..8ee4bd239303 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -3567,7 +3567,7 @@ static vm_fault_t do_anonymous_page(struct vm_fault *vmf)
 	vmf->pte = pte_offset_map_lock(vma->vm_mm, vmf->pmd, vmf->address,
 			&vmf->ptl);
 	if (!pte_none(*vmf->pte)) {
-		update_mmu_cache(vma, vmf->address, vmf->pte);
+		update_mmu_tlb(vma, vmf->address, vmf->pte);
 		goto release;
 	}
 
-- 
2.20.1

Re: [RFC PATCH 03/37] do_anonymous_page: use update_mmu_tlb()

[Michel Lespinasse]

Hi Bibo,

You introduced this code in commit 7df676974359f back in May.
Could you check that the change is correct ?

Thanks,

On Tue, Apr 06, 2021 at 06:44:28PM -0700, Michel Lespinasse wrote:
> update_mmu_tlb() can be used instead of update_mmu_cache() when the
> page fault handler detects that it lost the race to another page fault.
> 
> Signed-off-by: Michel Lespinasse <michel@lespinasse.org>
> ---
>  mm/memory.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/mm/memory.c b/mm/memory.c
> index 5efa07fb6cdc..8ee4bd239303 100644
> --- a/mm/memory.c
> +++ b/mm/memory.c
> @@ -3567,7 +3567,7 @@ static vm_fault_t do_anonymous_page(struct vm_fault *vmf)
>  	vmf->pte = pte_offset_map_lock(vma->vm_mm, vmf->pmd, vmf->address,
>  			&vmf->ptl);
>  	if (!pte_none(*vmf->pte)) {
> -		update_mmu_cache(vma, vmf->address, vmf->pte);
> +		update_mmu_tlb(vma, vmf->address, vmf->pte);
>  		goto release;
>  	}
>  
> -- 
> 2.20.1
> 

[RFC PATCH 04/37] do_anonymous_page: reduce code duplication

[Michel Lespinasse]

In do_anonymous_page(), we have separate cases for the zero page vs
allocating new anonymous pages. However, once the pte entry has been
computed, the rest of the handling (mapping and locking the page table,
checking that we didn't lose a race with another page fault handler, etc)
is identical between the two cases.

This change reduces the code duplication between the two cases.

Signed-off-by: Michel Lespinasse <michel@lespinasse.org>
---
 mm/memory.c | 85 +++++++++++++++++++++++------------------------------
 1 file changed, 37 insertions(+), 48 deletions(-)

diff --git a/mm/memory.c b/mm/memory.c
index 8ee4bd239303..477c98bfdd9d 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -3495,7 +3495,7 @@ vm_fault_t do_swap_page(struct vm_fault *vmf)
 static vm_fault_t do_anonymous_page(struct vm_fault *vmf)
 {
 	struct vm_area_struct *vma = vmf->vma;
-	struct page *page;
+	struct page *page = NULL;
 	vm_fault_t ret = 0;
 	pte_t entry;
 
@@ -3525,77 +3525,66 @@ static vm_fault_t do_anonymous_page(struct vm_fault *vmf)
 			!mm_forbids_zeropage(vma->vm_mm)) {
 		entry = pte_mkspecial(pfn_pte(my_zero_pfn(vmf->address),
 						vma->vm_page_prot));
-		vmf->pte = pte_offset_map_lock(vma->vm_mm, vmf->pmd,
-				vmf->address, &vmf->ptl);
-		if (!pte_none(*vmf->pte)) {
-			update_mmu_tlb(vma, vmf->address, vmf->pte);
-			goto unlock;
-		}
-		ret = check_stable_address_space(vma->vm_mm);
-		if (ret)
-			goto unlock;
-		/* Deliver the page fault to userland, check inside PT lock */
-		if (userfaultfd_missing(vma)) {
-			pte_unmap_unlock(vmf->pte, vmf->ptl);
-			return handle_userfault(vmf, VM_UFFD_MISSING);
-		}
-		goto setpte;
+	} else {
+		/* Allocate our own private page. */
+		if (unlikely(anon_vma_prepare(vma)))
+			goto oom;
+		page = alloc_zeroed_user_highpage_movable(vma, vmf->address);
+		if (!page)
+			goto oom;
+
+		if (mem_cgroup_charge(page, vma->vm_mm, GFP_KERNEL))
+			goto oom_free_page;
+		cgroup_throttle_swaprate(page, GFP_KERNEL);
+
+		/*
+		 * The memory barrier inside __SetPageUptodate makes sure that
+		 * preceding stores to the page contents become visible before
+		 * the set_pte_at() write.
+		 */
+		__SetPageUptodate(page);
+
+		entry = mk_pte(page, vma->vm_page_prot);
+		if (vma->vm_flags & VM_WRITE)
+			entry = pte_mkwrite(pte_mkdirty(entry));
 	}
 
-	/* Allocate our own private page. */
-	if (unlikely(anon_vma_prepare(vma)))
-		goto oom;
-	page = alloc_zeroed_user_highpage_movable(vma, vmf->address);
-	if (!page)
-		goto oom;
-
-	if (mem_cgroup_charge(page, vma->vm_mm, GFP_KERNEL))
-		goto oom_free_page;
-	cgroup_throttle_swaprate(page, GFP_KERNEL);
-
-	/*
-	 * The memory barrier inside __SetPageUptodate makes sure that
-	 * preceding stores to the page contents become visible before
-	 * the set_pte_at() write.
-	 */
-	__SetPageUptodate(page);
-
-	entry = mk_pte(page, vma->vm_page_prot);
-	if (vma->vm_flags & VM_WRITE)
-		entry = pte_mkwrite(pte_mkdirty(entry));
-
 	vmf->pte = pte_offset_map_lock(vma->vm_mm, vmf->pmd, vmf->address,
 			&vmf->ptl);
 	if (!pte_none(*vmf->pte)) {
 		update_mmu_tlb(vma, vmf->address, vmf->pte);
-		goto release;
+		goto unlock;
 	}
 
 	ret = check_stable_address_space(vma->vm_mm);
 	if (ret)
-		goto release;
+		goto unlock;
 
 	/* Deliver the page fault to userland, check inside PT lock */
 	if (userfaultfd_missing(vma)) {
 		pte_unmap_unlock(vmf->pte, vmf->ptl);
-		put_page(page);
+		if (page)
+			put_page(page);
 		return handle_userfault(vmf, VM_UFFD_MISSING);
 	}
 
-	inc_mm_counter_fast(vma->vm_mm, MM_ANONPAGES);
-	page_add_new_anon_rmap(page, vma, vmf->address, false);
-	lru_cache_add_inactive_or_unevictable(page, vma);
-setpte:
+	if (page) {
+		inc_mm_counter_fast(vma->vm_mm, MM_ANONPAGES);
+		page_add_new_anon_rmap(page, vma, vmf->address, false);
+		lru_cache_add_inactive_or_unevictable(page, vma);
+	}
+
 	set_pte_at(vma->vm_mm, vmf->address, vmf->pte, entry);
 
 	/* No need to invalidate - it was non-present before */
 	update_mmu_cache(vma, vmf->address, vmf->pte);
+	pte_unmap_unlock(vmf->pte, vmf->ptl);
+	return 0;
 unlock:
 	pte_unmap_unlock(vmf->pte, vmf->ptl);
+	if (page)
+		put_page(page);
 	return ret;
-release:
-	put_page(page);
-	goto unlock;
 oom_free_page:
 	put_page(page);
 oom:
-- 
2.20.1

[RFC PATCH 05/37] mm: introduce CONFIG_SPECULATIVE_PAGE_FAULT

[Michel Lespinasse]

This configuration variable will be used to build the code needed to
handle speculative page fault.

This is enabled by default on supported architectures with SMP and MMU set.

The architecture support is needed since the speculative page fault handler
is called from the architecture's page faulting code, and some code has to
be added there to try speculative fault handling first.

Signed-off-by: Michel Lespinasse <michel@lespinasse.org>
---
 mm/Kconfig | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/mm/Kconfig b/mm/Kconfig
index 24c045b24b95..322bda319dea 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -872,4 +872,26 @@ config MAPPING_DIRTY_HELPERS
 config KMAP_LOCAL
 	bool
 
+config ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT
+       def_bool n
+
+config SPECULATIVE_PAGE_FAULT
+	bool "Speculative page faults"
+	default y
+	depends on ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT && MMU && SMP
+	help
+	  Try to handle user space page faults without holding the mmap lock.
+
+	  Instead of blocking writers through the use of mmap lock,
+	  the page fault handler merely verifies, at the end of the page
+	  fault, that no writers have been running concurrently with it.
+
+	  In high concurrency situations, the speculative fault handler
+	  gains a throughput advantage by avoiding having to update the
+	  mmap lock reader count.
+
+	  If the check fails due to a concurrent writer, or due to hitting
+	  an unsupported case, the fault handler falls back to classical
+	  processing using the mmap read lock.
+
 endmenu
-- 
2.20.1

[RFC PATCH 06/37] x86/mm: define ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT

[Michel Lespinasse]

Set ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT so that the speculative fault
handling code can be compiled on this architecture.

Signed-off-by: Michel Lespinasse <michel@lespinasse.org>
---
 arch/x86/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 2792879d398e..a93e4ed7040e 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -33,6 +33,7 @@ config X86_64
 	select NEED_DMA_MAP_STATE
 	select SWIOTLB
 	select ARCH_HAS_ELFCORE_COMPAT
+	select ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT
 
 config FORCE_DYNAMIC_FTRACE
 	def_bool y
-- 
2.20.1

[RFC PATCH 07/37] mm: add FAULT_FLAG_SPECULATIVE flag

[Michel Lespinasse]

Define the new FAULT_FLAG_SPECULATIVE flag, which indicates when we are
attempting speculative fault handling (without holding the mmap lock).

Signed-off-by: Michel Lespinasse <michel@lespinasse.org>
---
 include/linux/mm.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 8ba434287387..021fdab5b721 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -434,6 +434,7 @@ extern pgprot_t protection_map[16];
  * @FAULT_FLAG_REMOTE: The fault is not for current task/mm.
  * @FAULT_FLAG_INSTRUCTION: The fault was during an instruction fetch.
  * @FAULT_FLAG_INTERRUPTIBLE: The fault can be interrupted by non-fatal signals.
+ * @FAULT_FLAG_SPECULATIVE: The fault is handled without holding the mmap_sem.
  *
  * About @FAULT_FLAG_ALLOW_RETRY and @FAULT_FLAG_TRIED: we can specify
  * whether we would allow page faults to retry by specifying these two
@@ -464,6 +465,7 @@ extern pgprot_t protection_map[16];
 #define FAULT_FLAG_REMOTE			0x80
 #define FAULT_FLAG_INSTRUCTION  		0x100
 #define FAULT_FLAG_INTERRUPTIBLE		0x200
+#define FAULT_FLAG_SPECULATIVE			0x400
 
 /*
  * The default fault flags that should be used by most of the
@@ -501,7 +503,8 @@ static inline bool fault_flag_allow_retry_first(unsigned int flags)
 	{ FAULT_FLAG_USER,		"USER" }, \
 	{ FAULT_FLAG_REMOTE,		"REMOTE" }, \
 	{ FAULT_FLAG_INSTRUCTION,	"INSTRUCTION" }, \
-	{ FAULT_FLAG_INTERRUPTIBLE,	"INTERRUPTIBLE" }
+	{ FAULT_FLAG_INTERRUPTIBLE,	"INTERRUPTIBLE" }, \
+	{ FAULT_FLAG_SPECULATIVE,	"SPECULATIVE" }
 
 /*
  * vm_fault is filled by the pagefault handler and passed to the vma's
-- 
2.20.1

[RFC PATCH 08/37] mm: add do_handle_mm_fault()

[Michel Lespinasse]

Add a new do_handle_mm_fault function, which extends the existing
handle_mm_fault() API by adding an mmap sequence count, to be used
in the FAULT_FLAG_SPECULATIVE case.

In the initial implementation, FAULT_FLAG_SPECULATIVE always fails
(by returning VM_FAULT_RETRY).

The existing handle_mm_fault() API is kept as a wrapper around
do_handle_mm_fault() so that we do not have to immediately update
every handle_mm_fault() call site.

Signed-off-by: Michel Lespinasse <michel@lespinasse.org>
---
 include/linux/mm.h | 12 +++++++++---
 mm/memory.c        | 10 +++++++---
 2 files changed, 16 insertions(+), 6 deletions(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 021fdab5b721..d5988e78e6ab 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1724,9 +1724,15 @@ int generic_error_remove_page(struct address_space *mapping, struct page *page);
 int invalidate_inode_page(struct page *page);
 
 #ifdef CONFIG_MMU
-extern vm_fault_t handle_mm_fault(struct vm_area_struct *vma,
-				  unsigned long address, unsigned int flags,
-				  struct pt_regs *regs);
+extern vm_fault_t do_handle_mm_fault(struct vm_area_struct *vma,
+		unsigned long address, unsigned int flags,
+		unsigned long seq, struct pt_regs *regs);
+static inline vm_fault_t handle_mm_fault(struct vm_area_struct *vma,
+		unsigned long address, unsigned int flags,
+		struct pt_regs *regs)
+{
+	return do_handle_mm_fault(vma, address, flags, 0, regs);
+}
 extern int fixup_user_fault(struct mm_struct *mm,
 			    unsigned long address, unsigned int fault_flags,
 			    bool *unlocked);
diff --git a/mm/memory.c b/mm/memory.c
index 477c98bfdd9d..3691be1f1319 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -4509,11 +4509,15 @@ static inline void mm_account_fault(struct pt_regs *regs,
  * The mmap_lock may have been released depending on flags and our
  * return value.  See filemap_fault() and __lock_page_or_retry().
  */
-vm_fault_t handle_mm_fault(struct vm_area_struct *vma, unsigned long address,
-			   unsigned int flags, struct pt_regs *regs)
+vm_fault_t do_handle_mm_fault(struct vm_area_struct *vma,
+		unsigned long address, unsigned int flags,
+		unsigned long seq, struct pt_regs *regs)
 {
 	vm_fault_t ret;
 
+	if (flags & FAULT_FLAG_SPECULATIVE)
+		return VM_FAULT_RETRY;
+
 	__set_current_state(TASK_RUNNING);
 
 	count_vm_event(PGFAULT);
@@ -4555,7 +4559,7 @@ vm_fault_t handle_mm_fault(struct vm_area_struct *vma, unsigned long address,
 
 	return ret;
 }
-EXPORT_SYMBOL_GPL(handle_mm_fault);
+EXPORT_SYMBOL_GPL(do_handle_mm_fault);
 
 #ifndef __PAGETABLE_P4D_FOLDED
 /*
-- 
2.20.1

[RFC PATCH 09/37] mm: add per-mm mmap sequence counter for speculative page fault handling.

[Michel Lespinasse]

The counter's write side is hooked into the existing mmap locking API:
mmap_write_lock() increments the counter to the next (odd) value, and
mmap_write_unlock() increments it again to the next (even) value.

The counter's speculative read side is supposed to be used as follows:

seq = mmap_seq_read_start(mm);
if (seq & 1)
	goto fail;
.... speculative handling here ....
if (!mmap_seq_read_check(mm, seq)
	goto fail;

This API guarantees that, if none of the "fail" tests abort
speculative execution, the speculative code section did not run
concurrently with any mmap writer.

This is very similar to a seqlock, but both the writer and speculative
readers are allowed to block. In the fail case, the speculative reader
does not spin on the sequence counter; instead it should fall back to
a different mechanism such as grabbing the mmap lock read side.

Signed-off-by: Michel Lespinasse <michel@lespinasse.org>
---
 include/linux/mm_types.h  |  4 +++
 include/linux/mmap_lock.h | 58 +++++++++++++++++++++++++++++++++++++--
 2 files changed, 60 insertions(+), 2 deletions(-)

diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 6613b26a8894..70882e628908 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -461,6 +461,10 @@ struct mm_struct {
 					     * counters
 					     */
 		struct rw_semaphore mmap_lock;
+#ifdef CONFIG_SPECULATIVE_PAGE_FAULT
+		unsigned long mmap_seq;
+#endif
+
 
 		struct list_head mmlist; /* List of maybe swapped mm's.	These
 					  * are globally strung together off
diff --git a/include/linux/mmap_lock.h b/include/linux/mmap_lock.h
index 8ff276a7560e..8f4eca2d0f43 100644
--- a/include/linux/mmap_lock.h
+++ b/include/linux/mmap_lock.h
@@ -8,8 +8,16 @@
 #include <linux/tracepoint-defs.h>
 #include <linux/types.h>
 
-#define MMAP_LOCK_INITIALIZER(name) \
-	.mmap_lock = __RWSEM_INITIALIZER((name).mmap_lock),
+#ifdef CONFIG_SPECULATIVE_PAGE_FAULT
+#define MMAP_LOCK_SEQ_INITIALIZER(name) \
+	.mmap_seq = 0,
+#else
+#define MMAP_LOCK_SEQ_INITIALIZER(name)
+#endif
+
+#define MMAP_LOCK_INITIALIZER(name)				\
+	.mmap_lock = __RWSEM_INITIALIZER((name).mmap_lock),	\
+	MMAP_LOCK_SEQ_INITIALIZER(name)
 
 DECLARE_TRACEPOINT(mmap_lock_start_locking);
 DECLARE_TRACEPOINT(mmap_lock_acquire_returned);
@@ -63,13 +71,52 @@ static inline void __mmap_lock_trace_released(struct mm_struct *mm, bool write)
 static inline void mmap_init_lock(struct mm_struct *mm)
 {
 	init_rwsem(&mm->mmap_lock);
+#ifdef CONFIG_SPECULATIVE_PAGE_FAULT
+	mm->mmap_seq = 0;
+#endif
 }
 
+static inline void __mmap_seq_write_lock(struct mm_struct *mm)
+{
+#ifdef CONFIG_SPECULATIVE_PAGE_FAULT
+	VM_BUG_ON_MM(mm->mmap_seq & 1, mm);
+	mm->mmap_seq++;
+	smp_wmb();
+#endif
+}
+
+static inline void __mmap_seq_write_unlock(struct mm_struct *mm)
+{
+#ifdef CONFIG_SPECULATIVE_PAGE_FAULT
+	smp_wmb();
+	mm->mmap_seq++;
+	VM_BUG_ON_MM(mm->mmap_seq & 1, mm);
+#endif
+}
+
+#ifdef CONFIG_SPECULATIVE_PAGE_FAULT
+static inline unsigned long mmap_seq_read_start(struct mm_struct *mm)
+{
+	unsigned long seq;
+
+	seq = READ_ONCE(mm->mmap_seq);
+	smp_rmb();
+	return seq;
+}
+
+static inline bool mmap_seq_read_check(struct mm_struct *mm, unsigned long seq)
+{
+	smp_rmb();
+	return seq == READ_ONCE(mm->mmap_seq);
+}
+#endif
+
 static inline void mmap_write_lock(struct mm_struct *mm)
 {
 	__mmap_lock_trace_start_locking(mm, true);
 	down_write(&mm->mmap_lock);
 	__mmap_lock_trace_acquire_returned(mm, true, true);
+	__mmap_seq_write_lock(mm);
 }
 
 static inline void mmap_write_lock_nested(struct mm_struct *mm, int subclass)
@@ -77,6 +124,7 @@ static inline void mmap_write_lock_nested(struct mm_struct *mm, int subclass)
 	__mmap_lock_trace_start_locking(mm, true);
 	down_write_nested(&mm->mmap_lock, subclass);
 	__mmap_lock_trace_acquire_returned(mm, true, true);
+	__mmap_seq_write_lock(mm);
 }
 
 static inline int mmap_write_lock_killable(struct mm_struct *mm)
@@ -86,6 +134,8 @@ static inline int mmap_write_lock_killable(struct mm_struct *mm)
 	__mmap_lock_trace_start_locking(mm, true);
 	error = down_write_killable(&mm->mmap_lock);
 	__mmap_lock_trace_acquire_returned(mm, true, !error);
+	if (likely(!error))
+		__mmap_seq_write_lock(mm);
 	return error;
 }
 
@@ -96,17 +146,21 @@ static inline bool mmap_write_trylock(struct mm_struct *mm)
 	__mmap_lock_trace_start_locking(mm, true);
 	ok = down_write_trylock(&mm->mmap_lock) != 0;
 	__mmap_lock_trace_acquire_returned(mm, true, ok);
+	if (likely(ok))
+		__mmap_seq_write_lock(mm);
 	return ok;
 }
 
 static inline void mmap_write_unlock(struct mm_struct *mm)
 {
+	__mmap_seq_write_unlock(mm);
 	up_write(&mm->mmap_lock);
 	__mmap_lock_trace_released(mm, true);
 }
 
 static inline void mmap_write_downgrade(struct mm_struct *mm)
 {
+	__mmap_seq_write_unlock(mm);
 	downgrade_write(&mm->mmap_lock);
 	__mmap_lock_trace_acquire_returned(mm, false, true);
 }
-- 
2.20.1

Re: [RFC PATCH 09/37] mm: add per-mm mmap sequence counter for speculative page fault handling.

[Peter Zijlstra]

On Tue, Apr 06, 2021 at 06:44:34PM -0700, Michel Lespinasse wrote:
> The counter's write side is hooked into the existing mmap locking API:
> mmap_write_lock() increments the counter to the next (odd) value, and
> mmap_write_unlock() increments it again to the next (even) value.
> 
> The counter's speculative read side is supposed to be used as follows:
> 
> seq = mmap_seq_read_start(mm);
> if (seq & 1)
> 	goto fail;
> .... speculative handling here ....
> if (!mmap_seq_read_check(mm, seq)
> 	goto fail;
> 
> This API guarantees that, if none of the "fail" tests abort
> speculative execution, the speculative code section did not run
> concurrently with any mmap writer.

So this is obviously safe, but it's also super excessive. Any change,
anywhere, will invalidate and abort a SPF.

Since you make a complete copy of the vma, you could memcmp it in its
entirety instead of this.

Re: [RFC PATCH 09/37] mm: add per-mm mmap sequence counter for speculative page fault handling.

[Michel Lespinasse]

On Wed, Apr 07, 2021 at 04:47:34PM +0200, Peter Zijlstra wrote:
> On Tue, Apr 06, 2021 at 06:44:34PM -0700, Michel Lespinasse wrote:
> > The counter's write side is hooked into the existing mmap locking API:
> > mmap_write_lock() increments the counter to the next (odd) value, and
> > mmap_write_unlock() increments it again to the next (even) value.
> > 
> > The counter's speculative read side is supposed to be used as follows:
> > 
> > seq = mmap_seq_read_start(mm);
> > if (seq & 1)
> > 	goto fail;
> > .... speculative handling here ....
> > if (!mmap_seq_read_check(mm, seq)
> > 	goto fail;
> > 
> > This API guarantees that, if none of the "fail" tests abort
> > speculative execution, the speculative code section did not run
> > concurrently with any mmap writer.
> 
> So this is obviously safe, but it's also super excessive. Any change,
> anywhere, will invalidate and abort a SPF.
> 
> Since you make a complete copy of the vma, you could memcmp it in its
> entirety instead of this.

Yeah, there is a deliberate choice here to start with the simplest
possible approach, but this could lead to more SPF aborts than
strictly necessary.

It's not clear to me that just comparing original vs current vma
attributes would always be sufficient - I think in some cases, we may
also need to worry about attributes being changed back and forth
concurrently with the fault. However, the comparison you suggest would
be safe at least in the case where the original pte was pte_none.

At some point, I did try implementing the optimization you suggest -
if the global counter has changed, re-fetch the current vma and
compare it against the old - but this was basically no help for the
(Android) workloads I looked at. There were just too few aborts that
were caused by the global counter in the first place. Note that my
patchset only handles anon and page cache faults speculatively, so
generally there wasn't very much time for the counter to change.

But yes, this may not hold across all workloads, and maybe we'd want
to do something smarter once/if a problem workload is identified.

[RFC PATCH 10/37] mm: rcu safe vma freeing

[Michel Lespinasse]

This prepares for speculative page faults looking up and copying vmas
under protection of an rcu read lock, instead of the usual mmap read lock.

Signed-off-by: Michel Lespinasse <michel@lespinasse.org>
---
 include/linux/mm_types.h | 16 +++++++++++-----
 kernel/fork.c            | 11 ++++++++++-
 2 files changed, 21 insertions(+), 6 deletions(-)

diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 70882e628908..024970635921 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -304,12 +304,18 @@ struct vm_userfaultfd_ctx {};
 struct vm_area_struct {
 	/* The first cache line has the info for VMA tree walking. */
 
-	unsigned long vm_start;		/* Our start address within vm_mm. */
-	unsigned long vm_end;		/* The first byte after our end address
-					   within vm_mm. */
+	union {
+		struct {
+			/* VMA covers [vm_start; vm_end) addresses within mm */
+			unsigned long vm_start, vm_end;
 
-	/* linked list of VM areas per task, sorted by address */
-	struct vm_area_struct *vm_next, *vm_prev;
+			/* linked list of VMAs per task, sorted by address */
+			struct vm_area_struct *vm_next, *vm_prev;
+		};
+#ifdef CONFIG_SPECULATIVE_PAGE_FAULT
+		struct rcu_head vm_rcu;	/* Used for deferred freeing. */
+#endif
+	};
 
 	struct rb_node vm_rb;
 
diff --git a/kernel/fork.c b/kernel/fork.c
index 426cd0c51f9e..b6078e546114 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -369,11 +369,20 @@ struct vm_area_struct *vm_area_dup(struct vm_area_struct *orig)
 	return new;
 }
 
-void vm_area_free(struct vm_area_struct *vma)
+#ifdef CONFIG_SPECULATIVE_PAGE_FAULT
+static void __vm_area_free(struct rcu_head *head)
 {
+	struct vm_area_struct *vma = container_of(head, struct vm_area_struct,
+						  vm_rcu);
 	kmem_cache_free(vm_area_cachep, vma);
 }
 
+void vm_area_free(struct vm_area_struct *vma)
+{
+	call_rcu(&vma->vm_rcu, __vm_area_free);
+}
+#endif	/* CONFIG_SPECULATIVE_PAGE_FAULT */
+
 static void account_kernel_stack(struct task_struct *tsk, int account)
 {
 	void *stack = task_stack_page(tsk);
-- 
2.20.1

[RFC PATCH 11/37] x86/mm: attempt speculative mm faults first

[Michel Lespinasse]

Attempt speculative mm fault handling first, and fall back to the
existing (non-speculative) code if that fails.

The speculative handling closely mirrors the non-speculative logic.
This includes some x86 specific bits such as the access_error() call.
This is why we chose to implement the speculative handling in arch/x86
rather than in common code.

The vma is first looked up and copied, under protection of the rcu
read lock. The mmap lock sequence count is used to verify the
integrity of the copied vma, and passed to do_handle_mm_fault() to
allow checking against races with mmap writers when finalizing the fault.

Signed-off-by: Michel Lespinasse <michel@lespinasse.org>
---
 arch/x86/mm/fault.c           | 36 +++++++++++++++++++++++++++++++++++
 include/linux/vm_event_item.h |  4 ++++
 mm/vmstat.c                   |  4 ++++
 3 files changed, 44 insertions(+)

diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index a73347e2cdfc..f8c8e325af77 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -1219,6 +1219,8 @@ void do_user_addr_fault(struct pt_regs *regs,
 	struct mm_struct *mm;
 	vm_fault_t fault;
 	unsigned int flags = FAULT_FLAG_DEFAULT;
+	struct vm_area_struct pvma;
+	unsigned long seq;
 
 	tsk = current;
 	mm = tsk->mm;
@@ -1316,6 +1318,39 @@ void do_user_addr_fault(struct pt_regs *regs,
 	}
 #endif
 
+	count_vm_event(SPF_ATTEMPT);
+	seq = mmap_seq_read_start(mm);
+	if (seq & 1)
+		goto spf_abort;
+	rcu_read_lock();
+	vma = find_vma(mm, address);
+	if (!vma || vma->vm_start > address) {
+		rcu_read_unlock();
+		goto spf_abort;
+	}
+	pvma = *vma;
+	rcu_read_unlock();
+	if (!mmap_seq_read_check(mm, seq))
+		goto spf_abort;
+	vma = &pvma;
+	if (unlikely(access_error(error_code, vma)))
+		goto spf_abort;
+	fault = do_handle_mm_fault(vma, address,
+				   flags | FAULT_FLAG_SPECULATIVE, seq, regs);
+
+	/* Quick path to respond to signals */
+	if (fault_signal_pending(fault, regs)) {
+		if (!user_mode(regs))
+			kernelmode_fixup_or_oops(regs, error_code, address,
+						 SIGBUS, BUS_ADRERR);
+		return;
+	}
+	if (!(fault & VM_FAULT_RETRY))
+		goto done;
+
+spf_abort:
+	count_vm_event(SPF_ABORT);
+
 	/*
 	 * Kernel-mode access to the user address space should only occur
 	 * on well-defined single instructions listed in the exception
@@ -1412,6 +1447,7 @@ void do_user_addr_fault(struct pt_regs *regs,
 	}
 
 	mmap_read_unlock(mm);
+done:
 	if (likely(!(fault & VM_FAULT_ERROR)))
 		return;
 
diff --git a/include/linux/vm_event_item.h b/include/linux/vm_event_item.h
index 18e75974d4e3..cc4f8d14e43f 100644
--- a/include/linux/vm_event_item.h
+++ b/include/linux/vm_event_item.h
@@ -120,6 +120,10 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT,
 #ifdef CONFIG_SWAP
 		SWAP_RA,
 		SWAP_RA_HIT,
+#endif
+#ifdef CONFIG_SPECULATIVE_PAGE_FAULT
+		SPF_ATTEMPT,
+		SPF_ABORT,
 #endif
 		NR_VM_EVENT_ITEMS
 };
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 74b2c374b86c..9ae1c27a549e 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -1365,6 +1365,10 @@ const char * const vmstat_text[] = {
 	"swap_ra",
 	"swap_ra_hit",
 #endif
+#ifdef CONFIG_SPECULATIVE_PAGE_FAULT
+	"spf_attempt",
+	"spf_abort",
+#endif
 #endif /* CONFIG_VM_EVENT_COUNTERS || CONFIG_MEMCG */
 };
 #endif /* CONFIG_PROC_FS || CONFIG_SYSFS || CONFIG_NUMA || CONFIG_MEMCG */
-- 
2.20.1

Re: [RFC PATCH 11/37] x86/mm: attempt speculative mm faults first

[Peter Zijlstra]

On Tue, Apr 06, 2021 at 06:44:36PM -0700, Michel Lespinasse wrote:
> --- a/arch/x86/mm/fault.c
> +++ b/arch/x86/mm/fault.c
> @@ -1219,6 +1219,8 @@ void do_user_addr_fault(struct pt_regs *regs,
>  	struct mm_struct *mm;
>  	vm_fault_t fault;
>  	unsigned int flags = FAULT_FLAG_DEFAULT;
> +	struct vm_area_struct pvma;

That's 200 bytes on-stack... I suppose that's just about acceptible, but
perhaps we need a comment in struct vm_area_struct to make people aware
this things lives on-stack and size really is an issue now.

Re: [RFC PATCH 11/37] x86/mm: attempt speculative mm faults first

[Matthew Wilcox]

On Wed, Apr 07, 2021 at 04:48:44PM +0200, Peter Zijlstra wrote:
> On Tue, Apr 06, 2021 at 06:44:36PM -0700, Michel Lespinasse wrote:
> > --- a/arch/x86/mm/fault.c
> > +++ b/arch/x86/mm/fault.c
> > @@ -1219,6 +1219,8 @@ void do_user_addr_fault(struct pt_regs *regs,
> >  	struct mm_struct *mm;
> >  	vm_fault_t fault;
> >  	unsigned int flags = FAULT_FLAG_DEFAULT;
> > +	struct vm_area_struct pvma;
> 
> That's 200 bytes on-stack... I suppose that's just about acceptible, but
> perhaps we need a comment in struct vm_area_struct to make people aware
> this things lives on-stack and size really is an issue now.

Michel's gone off and done his own thing here.

The rest of us (Laurent, Liam & I) are working on top of the maple tree
which shrinks vm_area_struct by five pointers, so just 160 bytes.

Also, our approach doesn't involve copying VMAs in order to handle a fault.

Re: [RFC PATCH 11/37] x86/mm: attempt speculative mm faults first

[Michel Lespinasse]

On Wed, Apr 07, 2021 at 04:35:28PM +0100, Matthew Wilcox wrote:
> On Wed, Apr 07, 2021 at 04:48:44PM +0200, Peter Zijlstra wrote:
> > On Tue, Apr 06, 2021 at 06:44:36PM -0700, Michel Lespinasse wrote:
> > > --- a/arch/x86/mm/fault.c
> > > +++ b/arch/x86/mm/fault.c
> > > @@ -1219,6 +1219,8 @@ void do_user_addr_fault(struct pt_regs *regs,
> > >  	struct mm_struct *mm;
> > >  	vm_fault_t fault;
> > >  	unsigned int flags = FAULT_FLAG_DEFAULT;
> > > +	struct vm_area_struct pvma;
> > 
> > That's 200 bytes on-stack... I suppose that's just about acceptible, but
> > perhaps we need a comment in struct vm_area_struct to make people aware
> > this things lives on-stack and size really is an issue now.
> 
> Michel's gone off and done his own thing here.

I don't think that is an entirely fair representation. First we are
both aware of each other's work, there is no working in dark caves here.
But also, I don't even consider this patchset to be entirely my thing;
most of the main building blocks come from prior proposals before mine.

> The rest of us (Laurent, Liam & I) are working on top of the maple tree
> which shrinks vm_area_struct by five pointers, so just 160 bytes.

The idea of evaluating maple tree and speculative faults as a bundle
is actually worrying to me. I think both ideas are interesting and
worth looking into on their own, but I'm not convinced that they have
much to do with each other.

> Also, our approach doesn't involve copying VMAs in order to handle a fault.

See my other reply to Peter's message - copying VMAs is a convenient
way to reduce the size of the patchset, but it's not fundamental to
the approach at all.

Re: [RFC PATCH 11/37] x86/mm: attempt speculative mm faults first

[Michel Lespinasse]

On Wed, Apr 07, 2021 at 04:48:44PM +0200, Peter Zijlstra wrote:
> On Tue, Apr 06, 2021 at 06:44:36PM -0700, Michel Lespinasse wrote:
> > --- a/arch/x86/mm/fault.c
> > +++ b/arch/x86/mm/fault.c
> > @@ -1219,6 +1219,8 @@ void do_user_addr_fault(struct pt_regs *regs,
> >  	struct mm_struct *mm;
> >  	vm_fault_t fault;
> >  	unsigned int flags = FAULT_FLAG_DEFAULT;
> > +	struct vm_area_struct pvma;
> 
> That's 200 bytes on-stack... I suppose that's just about acceptible, but
> perhaps we need a comment in struct vm_area_struct to make people aware
> this things lives on-stack and size really is an issue now.

Right, I agree that having the vma copy on-stack is not ideal.

I think what really should be done, is to copy just the attributes of
the vma that will be needed during the page fault. Things like vm_mm,
vm_page_prot, vm_flags, vm_ops, vm_pgoff, vm_file, vm_private_data,
vm_policy. We definitely do not need rbtree and rmap fields such as
vm_prev, vm_next, vm_rb, rb_subtree_gap, shared, anon_vma_chain etc...

The reason I did things this way, is because changing the entire fault
handler to use attributes stored in struct vm_fault, rather than in
the original vma, would be quite intrusive. I think it would be a
reasonable step to consider once there is agreement on the rest of the
speculative fault patch set, but it's practical doing it before then.

Re: [RFC PATCH 11/37] x86/mm: attempt speculative mm faults first

[Michel Lespinasse]

On Wed, Apr 07, 2021 at 01:14:53PM -0700, Michel Lespinasse wrote:
> On Wed, Apr 07, 2021 at 04:48:44PM +0200, Peter Zijlstra wrote:
> > On Tue, Apr 06, 2021 at 06:44:36PM -0700, Michel Lespinasse wrote:
> > > --- a/arch/x86/mm/fault.c
> > > +++ b/arch/x86/mm/fault.c
> > > @@ -1219,6 +1219,8 @@ void do_user_addr_fault(struct pt_regs *regs,
> > >  	struct mm_struct *mm;
> > >  	vm_fault_t fault;
> > >  	unsigned int flags = FAULT_FLAG_DEFAULT;
> > > +	struct vm_area_struct pvma;
> > 
> > That's 200 bytes on-stack... I suppose that's just about acceptible, but
> > perhaps we need a comment in struct vm_area_struct to make people aware
> > this things lives on-stack and size really is an issue now.
> 
> Right, I agree that having the vma copy on-stack is not ideal.
> 
> I think what really should be done, is to copy just the attributes of
> the vma that will be needed during the page fault. Things like vm_mm,
> vm_page_prot, vm_flags, vm_ops, vm_pgoff, vm_file, vm_private_data,
> vm_policy. We definitely do not need rbtree and rmap fields such as
> vm_prev, vm_next, vm_rb, rb_subtree_gap, shared, anon_vma_chain etc...
> 
> The reason I did things this way, is because changing the entire fault
> handler to use attributes stored in struct vm_fault, rather than in
> the original vma, would be quite intrusive. I think it would be a
> reasonable step to consider once there is agreement on the rest of the
> speculative fault patch set, but it's practical doing it before then.

I meant it's NOT practical using attributes rather than a vma copy
until there is sufficient agreement to merge the patchset.

[RFC PATCH 12/37] mm: refactor __handle_mm_fault() / handle_pte_fault()

[Michel Lespinasse]

Move the code that initializes vmf->pte and vmf->orig_pte from
handle_pte_fault() to its single call site in __handle_mm_fault().

This ensures vmf->pte is now initialized together with the higher levels
of the page table hierarchy. This also prepares for speculative page fault
handling, where the entire page table walk (higher levels down to ptes)
needs special care in the speculative case.

Signed-off-by: Michel Lespinasse <michel@lespinasse.org>
---
 mm/memory.c | 98 ++++++++++++++++++++++++++---------------------------
 1 file changed, 49 insertions(+), 49 deletions(-)

diff --git a/mm/memory.c b/mm/memory.c
index 3691be1f1319..66e7a4554c54 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -3516,7 +3516,7 @@ static vm_fault_t do_anonymous_page(struct vm_fault *vmf)
 	if (pte_alloc(vma->vm_mm, vmf->pmd))
 		return VM_FAULT_OOM;
 
-	/* See comment in handle_pte_fault() */
+	/* See comment in __handle_mm_fault() */
 	if (unlikely(pmd_trans_unstable(vmf->pmd)))
 		return 0;
 
@@ -3797,7 +3797,7 @@ vm_fault_t finish_fault(struct vm_fault *vmf)
 			return VM_FAULT_OOM;
 	}
 
-	/* See comment in handle_pte_fault() */
+	/* See comment in __handle_mm_fault() */
 	if (pmd_devmap_trans_unstable(vmf->pmd))
 		return 0;
 
@@ -4253,53 +4253,6 @@ static vm_fault_t handle_pte_fault(struct vm_fault *vmf)
 {
 	pte_t entry;
 
-	if (unlikely(pmd_none(*vmf->pmd))) {
-		/*
-		 * Leave __pte_alloc() until later: because vm_ops->fault may
-		 * want to allocate huge page, and if we expose page table
-		 * for an instant, it will be difficult to retract from
-		 * concurrent faults and from rmap lookups.
-		 */
-		vmf->pte = NULL;
-	} else {
-		/*
-		 * If a huge pmd materialized under us just retry later.  Use
-		 * pmd_trans_unstable() via pmd_devmap_trans_unstable() instead
-		 * of pmd_trans_huge() to ensure the pmd didn't become
-		 * pmd_trans_huge under us and then back to pmd_none, as a
-		 * result of MADV_DONTNEED running immediately after a huge pmd
-		 * fault in a different thread of this mm, in turn leading to a
-		 * misleading pmd_trans_huge() retval. All we have to ensure is
-		 * that it is a regular pmd that we can walk with
-		 * pte_offset_map() and we can do that through an atomic read
-		 * in C, which is what pmd_trans_unstable() provides.
-		 */
-		if (pmd_devmap_trans_unstable(vmf->pmd))
-			return 0;
-		/*
-		 * A regular pmd is established and it can't morph into a huge
-		 * pmd from under us anymore at this point because we hold the
-		 * mmap_lock read mode and khugepaged takes it in write mode.
-		 * So now it's safe to run pte_offset_map().
-		 */
-		vmf->pte = pte_offset_map(vmf->pmd, vmf->address);
-		vmf->orig_pte = *vmf->pte;
-
-		/*
-		 * some architectures can have larger ptes than wordsize,
-		 * e.g.ppc44x-defconfig has CONFIG_PTE_64BIT=y and
-		 * CONFIG_32BIT=y, so READ_ONCE cannot guarantee atomic
-		 * accesses.  The code below just needs a consistent view
-		 * for the ifs and we later double check anyway with the
-		 * ptl lock held. So here a barrier will do.
-		 */
-		barrier();
-		if (pte_none(vmf->orig_pte)) {
-			pte_unmap(vmf->pte);
-			vmf->pte = NULL;
-		}
-	}
-
 	if (!vmf->pte) {
 		if (vma_is_anonymous(vmf->vma))
 			return do_anonymous_page(vmf);
@@ -4439,6 +4392,53 @@ static vm_fault_t __handle_mm_fault(struct vm_area_struct *vma,
 		}
 	}
 
+	if (unlikely(pmd_none(*vmf.pmd))) {
+		/*
+		 * Leave __pte_alloc() until later: because vm_ops->fault may
+		 * want to allocate huge page, and if we expose page table
+		 * for an instant, it will be difficult to retract from
+		 * concurrent faults and from rmap lookups.
+		 */
+		vmf.pte = NULL;
+	} else {
+		/*
+		 * If a huge pmd materialized under us just retry later.  Use
+		 * pmd_trans_unstable() via pmd_devmap_trans_unstable() instead
+		 * of pmd_trans_huge() to ensure the pmd didn't become
+		 * pmd_trans_huge under us and then back to pmd_none, as a
+		 * result of MADV_DONTNEED running immediately after a huge pmd
+		 * fault in a different thread of this mm, in turn leading to a
+		 * misleading pmd_trans_huge() retval. All we have to ensure is
+		 * that it is a regular pmd that we can walk with
+		 * pte_offset_map() and we can do that through an atomic read
+		 * in C, which is what pmd_trans_unstable() provides.
+		 */
+		if (pmd_devmap_trans_unstable(vmf.pmd))
+			return 0;
+		/*
+		 * A regular pmd is established and it can't morph into a huge
+		 * pmd from under us anymore at this point because we hold the
+		 * mmap_lock read mode and khugepaged takes it in write mode.
+		 * So now it's safe to run pte_offset_map().
+		 */
+		vmf.pte = pte_offset_map(vmf.pmd, vmf.address);
+		vmf.orig_pte = *vmf.pte;
+
+		/*
+		 * some architectures can have larger ptes than wordsize,
+		 * e.g.ppc44x-defconfig has CONFIG_PTE_64BIT=y and
+		 * CONFIG_32BIT=y, so READ_ONCE cannot guarantee atomic
+		 * accesses.  The code below just needs a consistent view
+		 * for the ifs and we later double check anyway with the
+		 * ptl lock held. So here a barrier will do.
+		 */
+		barrier();
+		if (pte_none(vmf.orig_pte)) {
+			pte_unmap(vmf.pte);
+			vmf.pte = NULL;
+		}
+	}
+
 	return handle_pte_fault(&vmf);
 }
 
-- 
2.20.1

[RFC PATCH 13/37] mm: implement speculative handling in __handle_mm_fault().

[Michel Lespinasse]

The page table tree is walked with local irqs disabled, which prevents
page table reclamation (similarly to what fast GUP does). The logic is
otherwise similar to the non-speculative path, but with additional
restrictions: in the speculative path, we do not handle huge pages or
wiring new pages tables.

Signed-off-by: Michel Lespinasse <michel@lespinasse.org>
---
 include/linux/mm.h |  4 +++
 mm/memory.c        | 77 ++++++++++++++++++++++++++++++++++++++++++++--
 2 files changed, 79 insertions(+), 2 deletions(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index d5988e78e6ab..dee8a4833779 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -525,6 +525,10 @@ struct vm_fault {
 	};
 	unsigned int flags;		/* FAULT_FLAG_xxx flags
 					 * XXX: should really be 'const' */
+#ifdef CONFIG_SPECULATIVE_PAGE_FAULT
+	unsigned long seq;
+	pmd_t orig_pmd;
+#endif
 	pmd_t *pmd;			/* Pointer to pmd entry matching
 					 * the 'address' */
 	pud_t *pud;			/* Pointer to pud entry matching
diff --git a/mm/memory.c b/mm/memory.c
index 66e7a4554c54..a17704aac019 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -4307,7 +4307,7 @@ static vm_fault_t handle_pte_fault(struct vm_fault *vmf)
  * return value.  See filemap_fault() and __lock_page_or_retry().
  */
 static vm_fault_t __handle_mm_fault(struct vm_area_struct *vma,
-		unsigned long address, unsigned int flags)
+		unsigned long address, unsigned int flags, unsigned long seq)
 {
 	struct vm_fault vmf = {
 		.vma = vma,
@@ -4322,6 +4322,79 @@ static vm_fault_t __handle_mm_fault(struct vm_area_struct *vma,
 	p4d_t *p4d;
 	vm_fault_t ret;
 
+#ifdef CONFIG_SPECULATIVE_PAGE_FAULT
+	if (flags & FAULT_FLAG_SPECULATIVE) {
+		pgd_t pgdval;
+		p4d_t p4dval;
+		pud_t pudval;
+
+		vmf.seq = seq;
+
+		local_irq_disable();
+		pgd = pgd_offset(mm, address);
+		pgdval = READ_ONCE(*pgd);
+		if (pgd_none(pgdval) || unlikely(pgd_bad(pgdval)))
+			goto spf_fail;
+
+		p4d = p4d_offset(pgd, address);
+		p4dval = READ_ONCE(*p4d);
+		if (p4d_none(p4dval) || unlikely(p4d_bad(p4dval)))
+			goto spf_fail;
+
+		vmf.pud = pud_offset(p4d, address);
+		pudval = READ_ONCE(*vmf.pud);
+		if (pud_none(pudval) || unlikely(pud_bad(pudval)) ||
+		    unlikely(pud_trans_huge(pudval)) ||
+		    unlikely(pud_devmap(pudval)))
+			goto spf_fail;
+
+		vmf.pmd = pmd_offset(vmf.pud, address);
+		vmf.orig_pmd = READ_ONCE(*vmf.pmd);
+
+		/*
+		 * pmd_none could mean that a hugepage collapse is in
+		 * progress in our back as collapse_huge_page() mark
+		 * it before invalidating the pte (which is done once
+		 * the IPI is catched by all CPU and we have interrupt
+		 * disabled).  For this reason we cannot handle THP in
+		 * a speculative way since we can't safely identify an
+		 * in progress collapse operation done in our back on
+		 * that PMD.
+		 */
+		if (unlikely(pmd_none(vmf.orig_pmd) ||
+			     is_swap_pmd(vmf.orig_pmd) ||
+			     pmd_trans_huge(vmf.orig_pmd) ||
+			     pmd_devmap(vmf.orig_pmd)))
+			goto spf_fail;
+
+		/*
+		 * The above does not allocate/instantiate page-tables because
+		 * doing so would lead to the possibility of instantiating
+		 * page-tables after free_pgtables() -- and consequently
+		 * leaking them.
+		 *
+		 * The result is that we take at least one non-speculative
+		 * fault per PMD in order to instantiate it.
+		 */
+
+		vmf.pte = pte_offset_map(vmf.pmd, address);
+		vmf.orig_pte = READ_ONCE(*vmf.pte);
+		barrier();
+		if (pte_none(vmf.orig_pte)) {
+			pte_unmap(vmf.pte);
+			vmf.pte = NULL;
+		}
+
+		local_irq_enable();
+
+		return handle_pte_fault(&vmf);
+
+spf_fail:
+		local_irq_enable();
+		return VM_FAULT_RETRY;
+	}
+#endif	/* CONFIG_SPECULATIVE_PAGE_FAULT */
+
 	pgd = pgd_offset(mm, address);
 	p4d = p4d_alloc(mm, pgd, address);
 	if (!p4d)
@@ -4541,7 +4614,7 @@ vm_fault_t do_handle_mm_fault(struct vm_area_struct *vma,
 	if (unlikely(is_vm_hugetlb_page(vma)))
 		ret = hugetlb_fault(vma->vm_mm, vma, address, flags);
 	else
-		ret = __handle_mm_fault(vma, address, flags);
+		ret = __handle_mm_fault(vma, address, flags, seq);
 
 	if (flags & FAULT_FLAG_USER) {
 		mem_cgroup_exit_user_fault();
-- 
2.20.1

Re: [RFC PATCH 13/37] mm: implement speculative handling in __handle_mm_fault().

[Andy Lutomirski]

On 4/6/21 6:44 PM, Michel Lespinasse wrote:
> The page table tree is walked with local irqs disabled, which prevents
> page table reclamation (similarly to what fast GUP does). The logic is
> otherwise similar to the non-speculative path, but with additional
> restrictions: in the speculative path, we do not handle huge pages or
> wiring new pages tables.

Not on most architectures.  Quoting the actual comment in mm/gup.c:

>  * Before activating this code, please be aware that the following assumptions
>  * are currently made:
>  *
>  *  *) Either MMU_GATHER_RCU_TABLE_FREE is enabled, and tlb_remove_table() is used to
>  *  free pages containing page tables or TLB flushing requires IPI broadcast.

On MMU_GATHER_RCU_TABLE_FREE architectures, you cannot make the
assumption that it is safe to dereference a pointer in a page table just
because irqs are off.  You need RCU protection, too.

You have the same error in the cover letter.

--Andy

Re: [RFC PATCH 13/37] mm: implement speculative handling in __handle_mm_fault().

[Michel Lespinasse]

On Wed, Apr 07, 2021 at 08:36:01AM -0700, Andy Lutomirski wrote:
> On 4/6/21 6:44 PM, Michel Lespinasse wrote:
> > The page table tree is walked with local irqs disabled, which prevents
> > page table reclamation (similarly to what fast GUP does). The logic is
> > otherwise similar to the non-speculative path, but with additional
> > restrictions: in the speculative path, we do not handle huge pages or
> > wiring new pages tables.
> 
> Not on most architectures.  Quoting the actual comment in mm/gup.c:
> 
> >  * Before activating this code, please be aware that the following assumptions
> >  * are currently made:
> >  *
> >  *  *) Either MMU_GATHER_RCU_TABLE_FREE is enabled, and tlb_remove_table() is used to
> >  *  free pages containing page tables or TLB flushing requires IPI broadcast.
> 
> On MMU_GATHER_RCU_TABLE_FREE architectures, you cannot make the
> assumption that it is safe to dereference a pointer in a page table just
> because irqs are off.  You need RCU protection, too.
> 
> You have the same error in the cover letter.

Hi Andy,

Thanks for your comment. At first I thought did not matter, because we
only enable ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT on selected
architectures, and I thought MMU_GATHER_RCU_TABLE_FREE is not set on
these. But I was wrong - MMU_GATHER_RCU_TABLE_FREE is enabled on X86
with paravirt. So I took another look at fast GUP to make sure I
actually understand it.

This brings a question about lockless_pages_from_mm() - I see it
disabling interrupts, which it explains is necessary for disabling THP
splitting IPIs, but I do not see it taking an RCU read lock as would
be necessary for preventing paga table freeing on
MMU_GATHER_RCU_TABLE_FREE configs. I figure local_irq_save()
indirectly takes an rcu read lock somehow ? I think this is something
I should also mention in my explanation, and I have not seen a good
description of this on the fast GUP side...

Thanks,

--
Michel "walken" Lespinasse

Re: [RFC PATCH 13/37] mm: implement speculative handling in __handle_mm_fault().

[Andy Lutomirski]

On Wed, Apr 28, 2021 at 8:05 AM Michel Lespinasse <michel@lespinasse.org> wrote:
>
> On Wed, Apr 07, 2021 at 08:36:01AM -0700, Andy Lutomirski wrote:
> > On 4/6/21 6:44 PM, Michel Lespinasse wrote:
> > > The page table tree is walked with local irqs disabled, which prevents
> > > page table reclamation (similarly to what fast GUP does). The logic is
> > > otherwise similar to the non-speculative path, but with additional
> > > restrictions: in the speculative path, we do not handle huge pages or
> > > wiring new pages tables.
> >
> > Not on most architectures.  Quoting the actual comment in mm/gup.c:
> >
> > >  * Before activating this code, please be aware that the following assumptions
> > >  * are currently made:
> > >  *
> > >  *  *) Either MMU_GATHER_RCU_TABLE_FREE is enabled, and tlb_remove_table() is used to
> > >  *  free pages containing page tables or TLB flushing requires IPI broadcast.
> >
> > On MMU_GATHER_RCU_TABLE_FREE architectures, you cannot make the
> > assumption that it is safe to dereference a pointer in a page table just
> > because irqs are off.  You need RCU protection, too.
> >
> > You have the same error in the cover letter.
>
> Hi Andy,
>
> Thanks for your comment. At first I thought did not matter, because we
> only enable ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT on selected
> architectures, and I thought MMU_GATHER_RCU_TABLE_FREE is not set on
> these. But I was wrong - MMU_GATHER_RCU_TABLE_FREE is enabled on X86
> with paravirt. So I took another look at fast GUP to make sure I
> actually understand it.
>
> This brings a question about lockless_pages_from_mm() - I see it
> disabling interrupts, which it explains is necessary for disabling THP
> splitting IPIs, but I do not see it taking an RCU read lock as would
> be necessary for preventing paga table freeing on
> MMU_GATHER_RCU_TABLE_FREE configs. I figure local_irq_save()
> indirectly takes an rcu read lock somehow ? I think this is something
> I should also mention in my explanation, and I have not seen a good
> description of this on the fast GUP side...

Sounds like a bug!  That being said, based on my extremely limited
understanding of how the common RCU modes work, local_irq_save()
probably implies an RCU lock in at least some cases.  Hi Paul!

--Andy

Re: [RFC PATCH 13/37] mm: implement speculative handling in __handle_mm_fault().

[Paul E. McKenney]

On Wed, Apr 28, 2021 at 08:13:53AM -0700, Andy Lutomirski wrote:
> On Wed, Apr 28, 2021 at 8:05 AM Michel Lespinasse <michel@lespinasse.org> wrote:
> >
> > On Wed, Apr 07, 2021 at 08:36:01AM -0700, Andy Lutomirski wrote:
> > > On 4/6/21 6:44 PM, Michel Lespinasse wrote:
> > > > The page table tree is walked with local irqs disabled, which prevents
> > > > page table reclamation (similarly to what fast GUP does). The logic is
> > > > otherwise similar to the non-speculative path, but with additional
> > > > restrictions: in the speculative path, we do not handle huge pages or
> > > > wiring new pages tables.
> > >
> > > Not on most architectures.  Quoting the actual comment in mm/gup.c:
> > >
> > > >  * Before activating this code, please be aware that the following assumptions
> > > >  * are currently made:
> > > >  *
> > > >  *  *) Either MMU_GATHER_RCU_TABLE_FREE is enabled, and tlb_remove_table() is used to
> > > >  *  free pages containing page tables or TLB flushing requires IPI broadcast.
> > >
> > > On MMU_GATHER_RCU_TABLE_FREE architectures, you cannot make the
> > > assumption that it is safe to dereference a pointer in a page table just
> > > because irqs are off.  You need RCU protection, too.
> > >
> > > You have the same error in the cover letter.
> >
> > Hi Andy,
> >
> > Thanks for your comment. At first I thought did not matter, because we
> > only enable ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT on selected
> > architectures, and I thought MMU_GATHER_RCU_TABLE_FREE is not set on
> > these. But I was wrong - MMU_GATHER_RCU_TABLE_FREE is enabled on X86
> > with paravirt. So I took another look at fast GUP to make sure I
> > actually understand it.
> >
> > This brings a question about lockless_pages_from_mm() - I see it
> > disabling interrupts, which it explains is necessary for disabling THP
> > splitting IPIs, but I do not see it taking an RCU read lock as would
> > be necessary for preventing paga table freeing on
> > MMU_GATHER_RCU_TABLE_FREE configs. I figure local_irq_save()
> > indirectly takes an rcu read lock somehow ? I think this is something
> > I should also mention in my explanation, and I have not seen a good
> > description of this on the fast GUP side...
> 
> Sounds like a bug!  That being said, based on my extremely limited
> understanding of how the common RCU modes work, local_irq_save()
> probably implies an RCU lock in at least some cases.  Hi Paul!

In modern kernels, local_irq_save() does have RCU reader semantics,
meaning that synchronize_rcu() will wait for pre-exiting irq-disabled
regions.  It will also wait for pre-existing bh-disable, preempt-disable,
and of course rcu_read_lock() sections of code.

But don't try this in older kernels, that is not in kernel in which
synchronize_sched() is defined!

							Thanx, Paul

Re: [RFC PATCH 13/37] mm: implement speculative handling in __handle_mm_fault().

[Michel Lespinasse]

On Wed, Apr 28, 2021 at 09:11:08AM -0700, Paul E. McKenney wrote:
> On Wed, Apr 28, 2021 at 08:13:53AM -0700, Andy Lutomirski wrote:
> > On Wed, Apr 28, 2021 at 8:05 AM Michel Lespinasse <michel@lespinasse.org> wrote:
> > >
> > > On Wed, Apr 07, 2021 at 08:36:01AM -0700, Andy Lutomirski wrote:
> > > > On 4/6/21 6:44 PM, Michel Lespinasse wrote:
> > > > > The page table tree is walked with local irqs disabled, which prevents
> > > > > page table reclamation (similarly to what fast GUP does). The logic is
> > > > > otherwise similar to the non-speculative path, but with additional
> > > > > restrictions: in the speculative path, we do not handle huge pages or
> > > > > wiring new pages tables.
> > > >
> > > > Not on most architectures.  Quoting the actual comment in mm/gup.c:
> > > >
> > > > >  * Before activating this code, please be aware that the following assumptions
> > > > >  * are currently made:
> > > > >  *
> > > > >  *  *) Either MMU_GATHER_RCU_TABLE_FREE is enabled, and tlb_remove_table() is used to
> > > > >  *  free pages containing page tables or TLB flushing requires IPI broadcast.
> > > >
> > > > On MMU_GATHER_RCU_TABLE_FREE architectures, you cannot make the
> > > > assumption that it is safe to dereference a pointer in a page table just
> > > > because irqs are off.  You need RCU protection, too.
> > > >
> > > > You have the same error in the cover letter.
> > >
> > > Hi Andy,
> > >
> > > Thanks for your comment. At first I thought did not matter, because we
> > > only enable ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT on selected
> > > architectures, and I thought MMU_GATHER_RCU_TABLE_FREE is not set on
> > > these. But I was wrong - MMU_GATHER_RCU_TABLE_FREE is enabled on X86
> > > with paravirt. So I took another look at fast GUP to make sure I
> > > actually understand it.
> > >
> > > This brings a question about lockless_pages_from_mm() - I see it
> > > disabling interrupts, which it explains is necessary for disabling THP
> > > splitting IPIs, but I do not see it taking an RCU read lock as would
> > > be necessary for preventing paga table freeing on
> > > MMU_GATHER_RCU_TABLE_FREE configs. I figure local_irq_save()
> > > indirectly takes an rcu read lock somehow ? I think this is something
> > > I should also mention in my explanation, and I have not seen a good
> > > description of this on the fast GUP side...
> > 
> > Sounds like a bug!  That being said, based on my extremely limited
> > understanding of how the common RCU modes work, local_irq_save()
> > probably implies an RCU lock in at least some cases.  Hi Paul!
> 
> In modern kernels, local_irq_save() does have RCU reader semantics,
> meaning that synchronize_rcu() will wait for pre-exiting irq-disabled
> regions.  It will also wait for pre-existing bh-disable, preempt-disable,
> and of course rcu_read_lock() sections of code.

Thanks Paul for confirming / clarifying this. BTW, it would be good to
add this to the rcu header files, just so people have something to
reference to when they depend on such behavior (like fast GUP
currently does).

Going back to my patch. I don't need to protect against THP splitting
here, as I'm only handling the small page case. So when
MMU_GATHER_RCU_TABLE_FREE is enabled, I *think* I could get away with
using only an rcu read lock, instead of disabling interrupts which
implicitly creates the rcu read lock. I'm not sure which way to go -
fast GUP always disables interrupts regardless of the
MMU_GATHER_RCU_TABLE_FREE setting, and I think there is a case to be
made for following the fast GUP stes rather than trying to be smarter.

Andy, do you have any opinion on this ? Or anyone else really ?

Thanks,

--
Michel "walken" Lespinasse

Re: [RFC PATCH 13/37] mm: implement speculative handling in __handle_mm_fault().

[Andy Lutomirski]

On Wed, Apr 28, 2021 at 5:02 PM Michel Lespinasse <michel@lespinasse.org> wrote:
>
> On Wed, Apr 28, 2021 at 09:11:08AM -0700, Paul E. McKenney wrote:
> > On Wed, Apr 28, 2021 at 08:13:53AM -0700, Andy Lutomirski wrote:
> > > On Wed, Apr 28, 2021 at 8:05 AM Michel Lespinasse <michel@lespinasse.org> wrote:
> > > >
> > > > On Wed, Apr 07, 2021 at 08:36:01AM -0700, Andy Lutomirski wrote:
> > > > > On 4/6/21 6:44 PM, Michel Lespinasse wrote:
> > > > > > The page table tree is walked with local irqs disabled, which prevents
> > > > > > page table reclamation (similarly to what fast GUP does). The logic is
> > > > > > otherwise similar to the non-speculative path, but with additional
> > > > > > restrictions: in the speculative path, we do not handle huge pages or
> > > > > > wiring new pages tables.
> > > > >
> > > > > Not on most architectures.  Quoting the actual comment in mm/gup.c:
> > > > >
> > > > > >  * Before activating this code, please be aware that the following assumptions
> > > > > >  * are currently made:
> > > > > >  *
> > > > > >  *  *) Either MMU_GATHER_RCU_TABLE_FREE is enabled, and tlb_remove_table() is used to
> > > > > >  *  free pages containing page tables or TLB flushing requires IPI broadcast.
> > > > >
> > > > > On MMU_GATHER_RCU_TABLE_FREE architectures, you cannot make the
> > > > > assumption that it is safe to dereference a pointer in a page table just
> > > > > because irqs are off.  You need RCU protection, too.
> > > > >
> > > > > You have the same error in the cover letter.
> > > >
> > > > Hi Andy,
> > > >
> > > > Thanks for your comment. At first I thought did not matter, because we
> > > > only enable ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT on selected
> > > > architectures, and I thought MMU_GATHER_RCU_TABLE_FREE is not set on
> > > > these. But I was wrong - MMU_GATHER_RCU_TABLE_FREE is enabled on X86
> > > > with paravirt. So I took another look at fast GUP to make sure I
> > > > actually understand it.
> > > >
> > > > This brings a question about lockless_pages_from_mm() - I see it
> > > > disabling interrupts, which it explains is necessary for disabling THP
> > > > splitting IPIs, but I do not see it taking an RCU read lock as would
> > > > be necessary for preventing paga table freeing on
> > > > MMU_GATHER_RCU_TABLE_FREE configs. I figure local_irq_save()
> > > > indirectly takes an rcu read lock somehow ? I think this is something
> > > > I should also mention in my explanation, and I have not seen a good
> > > > description of this on the fast GUP side...
> > >
> > > Sounds like a bug!  That being said, based on my extremely limited
> > > understanding of how the common RCU modes work, local_irq_save()
> > > probably implies an RCU lock in at least some cases.  Hi Paul!
> >
> > In modern kernels, local_irq_save() does have RCU reader semantics,
> > meaning that synchronize_rcu() will wait for pre-exiting irq-disabled
> > regions.  It will also wait for pre-existing bh-disable, preempt-disable,
> > and of course rcu_read_lock() sections of code.
>
> Thanks Paul for confirming / clarifying this. BTW, it would be good to
> add this to the rcu header files, just so people have something to
> reference to when they depend on such behavior (like fast GUP
> currently does).

Or, even better, fast GUP could add an explicit RCU read lock.

>
> Going back to my patch. I don't need to protect against THP splitting
> here, as I'm only handling the small page case. So when
> MMU_GATHER_RCU_TABLE_FREE is enabled, I *think* I could get away with
> using only an rcu read lock, instead of disabling interrupts which
> implicitly creates the rcu read lock. I'm not sure which way to go -
> fast GUP always disables interrupts regardless of the
> MMU_GATHER_RCU_TABLE_FREE setting, and I think there is a case to be
> made for following the fast GUP stes rather than trying to be smarter.

How about adding some little helpers:

lockless_page_walk_begin();

lockless_page_walk_end();

these turn into RCU read locks if MMU_GATHER_RCU_TABLE_FREE and into
irqsave otherwise.  And they're somewhat self-documenting.

--Andy

Re: [RFC PATCH 13/37] mm: implement speculative handling in __handle_mm_fault().

[Matthew Wilcox]

On Wed, Apr 28, 2021 at 05:05:17PM -0700, Andy Lutomirski wrote:
> On Wed, Apr 28, 2021 at 5:02 PM Michel Lespinasse <michel@lespinasse.org> wrote:
> > Thanks Paul for confirming / clarifying this. BTW, it would be good to
> > add this to the rcu header files, just so people have something to
> > reference to when they depend on such behavior (like fast GUP
> > currently does).
> 
> Or, even better, fast GUP could add an explicit RCU read lock.
> 
> >
> > Going back to my patch. I don't need to protect against THP splitting
> > here, as I'm only handling the small page case. So when
> > MMU_GATHER_RCU_TABLE_FREE is enabled, I *think* I could get away with
> > using only an rcu read lock, instead of disabling interrupts which
> > implicitly creates the rcu read lock. I'm not sure which way to go -
> > fast GUP always disables interrupts regardless of the
> > MMU_GATHER_RCU_TABLE_FREE setting, and I think there is a case to be
> > made for following the fast GUP stes rather than trying to be smarter.
> 
> How about adding some little helpers:
> 
> lockless_page_walk_begin();
> 
> lockless_page_walk_end();
> 
> these turn into RCU read locks if MMU_GATHER_RCU_TABLE_FREE and into
> irqsave otherwise.  And they're somewhat self-documenting.

One of the worst things we can do while holding a spinlock is take a
cache miss because we then delay for several thousand cycles to wait for
the cache line.  That gives every other CPU a really long opportunity
to slam into the spinlock and things go downhill fast at that point.
We've even seen patches to do things like read A, take lock L, then read
A to avoid the cache miss while holding the lock.

What sort of performance effect would it have to free page tables
under RCU for all architectures?  It's painful on s390 & powerpc because
different tables share the same struct page, but I have to believe that's
a solvable problem.

Re: [RFC PATCH 13/37] mm: implement speculative handling in __handle_mm_fault().

[Andy Lutomirski]

> On Apr 29, 2021, at 9:12 AM, Matthew Wilcox <willy@infradead.org> wrote:
> 
> On Wed, Apr 28, 2021 at 05:05:17PM -0700, Andy Lutomirski wrote:
>>> On Wed, Apr 28, 2021 at 5:02 PM Michel Lespinasse <michel@lespinasse.org> wrote:
>>> Thanks Paul for confirming / clarifying this. BTW, it would be good to
>>> add this to the rcu header files, just so people have something to
>>> reference to when they depend on such behavior (like fast GUP
>>> currently does).
>> 
>> Or, even better, fast GUP could add an explicit RCU read lock.
>> 
>>> 
>>> Going back to my patch. I don't need to protect against THP splitting
>>> here, as I'm only handling the small page case. So when
>>> MMU_GATHER_RCU_TABLE_FREE is enabled, I *think* I could get away with
>>> using only an rcu read lock, instead of disabling interrupts which
>>> implicitly creates the rcu read lock. I'm not sure which way to go -
>>> fast GUP always disables interrupts regardless of the
>>> MMU_GATHER_RCU_TABLE_FREE setting, and I think there is a case to be
>>> made for following the fast GUP stes rather than trying to be smarter.
>> 
>> How about adding some little helpers:
>> 
>> lockless_page_walk_begin();
>> 
>> lockless_page_walk_end();
>> 
>> these turn into RCU read locks if MMU_GATHER_RCU_TABLE_FREE and into
>> irqsave otherwise.  And they're somewhat self-documenting.
> 
> One of the worst things we can do while holding a spinlock is take a
> cache miss because we then delay for several thousand cycles to wait for
> the cache line.  That gives every other CPU a really long opportunity
> to slam into the spinlock and things go downhill fast at that point.
> We've even seen patches to do things like read A, take lock L, then read
> A to avoid the cache miss while holding the lock.
> 
> What sort of performance effect would it have to free page tables
> under RCU for all architectures?  It's painful on s390 & powerpc because
> different tables share the same struct page, but I have to believe that's
> a solvable problem.

The IPI locking mechanism is entirely useless on any architecture that wants to do paravirt shootdowns, so this seems like a good strategy to me.

Re: [RFC PATCH 13/37] mm: implement speculative handling in __handle_mm_fault().

[Michel Lespinasse]

On Thu, Apr 29, 2021 at 05:12:34PM +0100, Matthew Wilcox wrote:
> On Wed, Apr 28, 2021 at 05:05:17PM -0700, Andy Lutomirski wrote:
> > On Wed, Apr 28, 2021 at 5:02 PM Michel Lespinasse <michel@lespinasse.org> wrote:
> > > Thanks Paul for confirming / clarifying this. BTW, it would be good to
> > > add this to the rcu header files, just so people have something to
> > > reference to when they depend on such behavior (like fast GUP
> > > currently does).
> > 
> > Or, even better, fast GUP could add an explicit RCU read lock.
> > 
> > >
> > > Going back to my patch. I don't need to protect against THP splitting
> > > here, as I'm only handling the small page case. So when
> > > MMU_GATHER_RCU_TABLE_FREE is enabled, I *think* I could get away with
> > > using only an rcu read lock, instead of disabling interrupts which
> > > implicitly creates the rcu read lock. I'm not sure which way to go -
> > > fast GUP always disables interrupts regardless of the
> > > MMU_GATHER_RCU_TABLE_FREE setting, and I think there is a case to be
> > > made for following the fast GUP stes rather than trying to be smarter.
> > 
> > How about adding some little helpers:
> > 
> > lockless_page_walk_begin();
> > 
> > lockless_page_walk_end();
> > 
> > these turn into RCU read locks if MMU_GATHER_RCU_TABLE_FREE and into
> > irqsave otherwise.  And they're somewhat self-documenting.
> 
> One of the worst things we can do while holding a spinlock is take a
> cache miss because we then delay for several thousand cycles to wait for
> the cache line.  That gives every other CPU a really long opportunity
> to slam into the spinlock and things go downhill fast at that point.
> We've even seen patches to do things like read A, take lock L, then read
> A to avoid the cache miss while holding the lock.

I understand the effect your are describing, but I do not see how it
applies here - what cacheline are we likely to miss on when using
local_irq_disable() that we wouldn't touch if using rcu_read_lock() ?

> What sort of performance effect would it have to free page tables
> under RCU for all architectures?  It's painful on s390 & powerpc because
> different tables share the same struct page, but I have to believe that's
> a solvable problem.

I agree using RCU to free page tables would be a good thing to try.
I am afraid of adding that to this patchset though, as it seems
somewhate unrelated and adds risk. IMO we are most likely to find
justification for pushing this if/when we try accessing remote mm's without
taking the mmap lock, since disabling IPIs clearly wouldn't work there.

--
Michel "walken" Lespinasse

Re: [RFC PATCH 13/37] mm: implement speculative handling in __handle_mm_fault().

[Matthew Wilcox]

On Thu, Apr 29, 2021 at 12:14:28PM -0700, Michel Lespinasse wrote:
> On Thu, Apr 29, 2021 at 05:12:34PM +0100, Matthew Wilcox wrote:
> > One of the worst things we can do while holding a spinlock is take a
> > cache miss because we then delay for several thousand cycles to wait for
> > the cache line.  That gives every other CPU a really long opportunity
> > to slam into the spinlock and things go downhill fast at that point.
> > We've even seen patches to do things like read A, take lock L, then read
> > A to avoid the cache miss while holding the lock.
> 
> I understand the effect your are describing, but I do not see how it
> applies here - what cacheline are we likely to miss on when using
> local_irq_disable() that we wouldn't touch if using rcu_read_lock() ?

It's the same cache lines in both cases.  The difference is that in one
case we have interrupts disabled (and a spinlock held?  i wasn't clear
on that) and in the other case, we just have preemption disabled.

> > What sort of performance effect would it have to free page tables
> > under RCU for all architectures?  It's painful on s390 & powerpc because
> > different tables share the same struct page, but I have to believe that's
> > a solvable problem.
> 
> I agree using RCU to free page tables would be a good thing to try.
> I am afraid of adding that to this patchset though, as it seems
> somewhate unrelated and adds risk. IMO we are most likely to find
> justification for pushing this if/when we try accessing remote mm's without
> taking the mmap lock, since disabling IPIs clearly wouldn't work there.

I think that needs to happen _before_ this patchset.  Creating a mess and
then trying to clean it up later isn't a great way to do development.

Re: [RFC PATCH 13/37] mm: implement speculative handling in __handle_mm_fault().

[Michel Lespinasse]

On Thu, Apr 29, 2021 at 08:34:56PM +0100, Matthew Wilcox wrote:
> On Thu, Apr 29, 2021 at 12:14:28PM -0700, Michel Lespinasse wrote:
> > On Thu, Apr 29, 2021 at 05:12:34PM +0100, Matthew Wilcox wrote:
> > > One of the worst things we can do while holding a spinlock is take a
> > > cache miss because we then delay for several thousand cycles to wait for
> > > the cache line.  That gives every other CPU a really long opportunity
> > > to slam into the spinlock and things go downhill fast at that point.
> > > We've even seen patches to do things like read A, take lock L, then read
> > > A to avoid the cache miss while holding the lock.
> > 
> > I understand the effect your are describing, but I do not see how it
> > applies here - what cacheline are we likely to miss on when using
> > local_irq_disable() that we wouldn't touch if using rcu_read_lock() ?
> 
> It's the same cache lines in both cases.  The difference is that in one
> case we have interrupts disabled (and a spinlock held?  i wasn't clear
> on that) and in the other case, we just have preemption disabled.

To add some context - the problem we are trying to solve here (and a
different instance of it in the next commit) is that we are trying to
map and/or lock the page table, but need to prevent it from being
freed while we are trying to do so. Disabling interrupts or taking an
rcu read lock are two mechanisms for preventing that race, but the
structures accessed are the same in either case.

> > > What sort of performance effect would it have to free page tables
> > > under RCU for all architectures?  It's painful on s390 & powerpc because
> > > different tables share the same struct page, but I have to believe that's
> > > a solvable problem.
> > 
> > I agree using RCU to free page tables would be a good thing to try.
> > I am afraid of adding that to this patchset though, as it seems
> > somewhate unrelated and adds risk. IMO we are most likely to find
> > justification for pushing this if/when we try accessing remote mm's without
> > taking the mmap lock, since disabling IPIs clearly wouldn't work there.
> 
> I think that needs to happen _before_ this patchset.  Creating a mess and
> then trying to clean it up later isn't a great way to do development.

Agree we don't want to create a mess... but I see that as an argument for
not hastily changing the way page tables are reclaimed...

--
Michel "walken" Lespinasse

Re: [RFC PATCH 13/37] mm: implement speculative handling in __handle_mm_fault().

[Paul E. McKenney]

On Wed, Apr 28, 2021 at 05:02:25PM -0700, Michel Lespinasse wrote:
> On Wed, Apr 28, 2021 at 09:11:08AM -0700, Paul E. McKenney wrote:
> > On Wed, Apr 28, 2021 at 08:13:53AM -0700, Andy Lutomirski wrote:
> > > On Wed, Apr 28, 2021 at 8:05 AM Michel Lespinasse <michel@lespinasse.org> wrote:
> > > >
> > > > On Wed, Apr 07, 2021 at 08:36:01AM -0700, Andy Lutomirski wrote:
> > > > > On 4/6/21 6:44 PM, Michel Lespinasse wrote:
> > > > > > The page table tree is walked with local irqs disabled, which prevents
> > > > > > page table reclamation (similarly to what fast GUP does). The logic is
> > > > > > otherwise similar to the non-speculative path, but with additional
> > > > > > restrictions: in the speculative path, we do not handle huge pages or
> > > > > > wiring new pages tables.
> > > > >
> > > > > Not on most architectures.  Quoting the actual comment in mm/gup.c:
> > > > >
> > > > > >  * Before activating this code, please be aware that the following assumptions
> > > > > >  * are currently made:
> > > > > >  *
> > > > > >  *  *) Either MMU_GATHER_RCU_TABLE_FREE is enabled, and tlb_remove_table() is used to
> > > > > >  *  free pages containing page tables or TLB flushing requires IPI broadcast.
> > > > >
> > > > > On MMU_GATHER_RCU_TABLE_FREE architectures, you cannot make the
> > > > > assumption that it is safe to dereference a pointer in a page table just
> > > > > because irqs are off.  You need RCU protection, too.
> > > > >
> > > > > You have the same error in the cover letter.
> > > >
> > > > Hi Andy,
> > > >
> > > > Thanks for your comment. At first I thought did not matter, because we
> > > > only enable ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT on selected
> > > > architectures, and I thought MMU_GATHER_RCU_TABLE_FREE is not set on
> > > > these. But I was wrong - MMU_GATHER_RCU_TABLE_FREE is enabled on X86
> > > > with paravirt. So I took another look at fast GUP to make sure I
> > > > actually understand it.
> > > >
> > > > This brings a question about lockless_pages_from_mm() - I see it
> > > > disabling interrupts, which it explains is necessary for disabling THP
> > > > splitting IPIs, but I do not see it taking an RCU read lock as would
> > > > be necessary for preventing paga table freeing on
> > > > MMU_GATHER_RCU_TABLE_FREE configs. I figure local_irq_save()
> > > > indirectly takes an rcu read lock somehow ? I think this is something
> > > > I should also mention in my explanation, and I have not seen a good
> > > > description of this on the fast GUP side...
> > > 
> > > Sounds like a bug!  That being said, based on my extremely limited
> > > understanding of how the common RCU modes work, local_irq_save()
> > > probably implies an RCU lock in at least some cases.  Hi Paul!
> > 
> > In modern kernels, local_irq_save() does have RCU reader semantics,
> > meaning that synchronize_rcu() will wait for pre-exiting irq-disabled
> > regions.  It will also wait for pre-existing bh-disable, preempt-disable,
> > and of course rcu_read_lock() sections of code.
> 
> Thanks Paul for confirming / clarifying this. BTW, it would be good to
> add this to the rcu header files, just so people have something to
> reference to when they depend on such behavior (like fast GUP
> currently does).

There is this in the synchronize_rcu() header block comment:

 * synchronize_rcu() was waiting.  RCU read-side critical sections are
 * delimited by rcu_read_lock() and rcu_read_unlock(), and may be nested.
 * In addition, regions of code across which interrupts, preemption, or
 * softirqs have been disabled also serve as RCU read-side critical
 * sections.  This includes hardware interrupt handlers, softirq handlers,
 * and NMI handlers.

I have pulled this into a separate paragraph to increase its visibility,
and will check out other locations in comments and documentation.

							Thanx, Paul

> Going back to my patch. I don't need to protect against THP splitting
> here, as I'm only handling the small page case. So when
> MMU_GATHER_RCU_TABLE_FREE is enabled, I *think* I could get away with
> using only an rcu read lock, instead of disabling interrupts which
> implicitly creates the rcu read lock. I'm not sure which way to go -
> fast GUP always disables interrupts regardless of the
> MMU_GATHER_RCU_TABLE_FREE setting, and I think there is a case to be
> made for following the fast GUP stes rather than trying to be smarter.
> 
> Andy, do you have any opinion on this ? Or anyone else really ?
> 
> Thanks,
> 
> --
> Michel "walken" Lespinasse

Re: [RFC PATCH 13/37] mm: implement speculative handling in __handle_mm_fault().

[Paul E. McKenney]

On Thu, Apr 29, 2021 at 08:52:50AM -0700, Paul E. McKenney wrote:
> On Wed, Apr 28, 2021 at 05:02:25PM -0700, Michel Lespinasse wrote:
> > On Wed, Apr 28, 2021 at 09:11:08AM -0700, Paul E. McKenney wrote:
> > > On Wed, Apr 28, 2021 at 08:13:53AM -0700, Andy Lutomirski wrote:
> > > > On Wed, Apr 28, 2021 at 8:05 AM Michel Lespinasse <michel@lespinasse.org> wrote:
> > > > >
> > > > > On Wed, Apr 07, 2021 at 08:36:01AM -0700, Andy Lutomirski wrote:
> > > > > > On 4/6/21 6:44 PM, Michel Lespinasse wrote:
> > > > > > > The page table tree is walked with local irqs disabled, which prevents
> > > > > > > page table reclamation (similarly to what fast GUP does). The logic is
> > > > > > > otherwise similar to the non-speculative path, but with additional
> > > > > > > restrictions: in the speculative path, we do not handle huge pages or
> > > > > > > wiring new pages tables.
> > > > > >
> > > > > > Not on most architectures.  Quoting the actual comment in mm/gup.c:
> > > > > >
> > > > > > >  * Before activating this code, please be aware that the following assumptions
> > > > > > >  * are currently made:
> > > > > > >  *
> > > > > > >  *  *) Either MMU_GATHER_RCU_TABLE_FREE is enabled, and tlb_remove_table() is used to
> > > > > > >  *  free pages containing page tables or TLB flushing requires IPI broadcast.
> > > > > >
> > > > > > On MMU_GATHER_RCU_TABLE_FREE architectures, you cannot make the
> > > > > > assumption that it is safe to dereference a pointer in a page table just
> > > > > > because irqs are off.  You need RCU protection, too.
> > > > > >
> > > > > > You have the same error in the cover letter.
> > > > >
> > > > > Hi Andy,
> > > > >
> > > > > Thanks for your comment. At first I thought did not matter, because we
> > > > > only enable ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT on selected
> > > > > architectures, and I thought MMU_GATHER_RCU_TABLE_FREE is not set on
> > > > > these. But I was wrong - MMU_GATHER_RCU_TABLE_FREE is enabled on X86
> > > > > with paravirt. So I took another look at fast GUP to make sure I
> > > > > actually understand it.
> > > > >
> > > > > This brings a question about lockless_pages_from_mm() - I see it
> > > > > disabling interrupts, which it explains is necessary for disabling THP
> > > > > splitting IPIs, but I do not see it taking an RCU read lock as would
> > > > > be necessary for preventing paga table freeing on
> > > > > MMU_GATHER_RCU_TABLE_FREE configs. I figure local_irq_save()
> > > > > indirectly takes an rcu read lock somehow ? I think this is something
> > > > > I should also mention in my explanation, and I have not seen a good
> > > > > description of this on the fast GUP side...
> > > > 
> > > > Sounds like a bug!  That being said, based on my extremely limited
> > > > understanding of how the common RCU modes work, local_irq_save()
> > > > probably implies an RCU lock in at least some cases.  Hi Paul!
> > > 
> > > In modern kernels, local_irq_save() does have RCU reader semantics,
> > > meaning that synchronize_rcu() will wait for pre-exiting irq-disabled
> > > regions.  It will also wait for pre-existing bh-disable, preempt-disable,
> > > and of course rcu_read_lock() sections of code.
> > 
> > Thanks Paul for confirming / clarifying this. BTW, it would be good to
> > add this to the rcu header files, just so people have something to
> > reference to when they depend on such behavior (like fast GUP
> > currently does).
> 
> There is this in the synchronize_rcu() header block comment:
> 
>  * synchronize_rcu() was waiting.  RCU read-side critical sections are
>  * delimited by rcu_read_lock() and rcu_read_unlock(), and may be nested.
>  * In addition, regions of code across which interrupts, preemption, or
>  * softirqs have been disabled also serve as RCU read-side critical
>  * sections.  This includes hardware interrupt handlers, softirq handlers,
>  * and NMI handlers.
> 
> I have pulled this into a separate paragraph to increase its visibility,
> and will check out other locations in comments and documentation.

Ditto for call_rcu() and the separate paragraph.

The rcu_read_lock_bh() and rcu_read_lock_sched() header comments noted
that these act as RCU read-side critical sections, but I added similar
verbiage to rcu_dereference_bh_check() and rcu_dereference_sched_check().

Please see below for the resulting commit.

Thoughts?

							Thanx, Paul

------------------------------------------------------------------------

commit 97262c64c2cf807bf06825e454c4bedd228fadfb
Author: Paul E. McKenney <paulmck@kernel.org>
Date:   Thu Apr 29 11:18:01 2021 -0700

    rcu: Improve comments describing RCU read-side critical sections
    
    There are a number of places that call out the fact that preempt-disable
    regions of code now act as RCU read-side critical sections, where
    preempt-disable regions of code include irq-disable regions of code,
    bh-disable regions of code, hardirq handlers, and NMI handlers.  However,
    someone relying solely on (for example) the call_rcu() header comment
    might well have no idea that preempt-disable regions of code have RCU
    semantics.
    
    This commit therefore updates the header comments for
    call_rcu(), synchronize_rcu(), rcu_dereference_bh_check(), and
    rcu_dereference_sched_check() to call out these new(ish) forms of RCU
    readers.
    
    Reported-by: Michel Lespinasse <michel@lespinasse.org>
    Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index a10480f2b4ef..c01b04ad64c4 100644
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -532,7 +532,10 @@ do {									      \
  * @p: The pointer to read, prior to dereferencing
  * @c: The conditions under which the dereference will take place
  *
- * This is the RCU-bh counterpart to rcu_dereference_check().
+ * This is the RCU-bh counterpart to rcu_dereference_check().  However,
+ * please note that in recent kernels, synchronize_rcu() waits for
+ * local_bh_disable() regions of code in addition to regions of code
+ * demarked by rcu_read_lock() and rcu_read_unlock().
  */
 #define rcu_dereference_bh_check(p, c) \
 	__rcu_dereference_check((p), (c) || rcu_read_lock_bh_held(), __rcu)
@@ -543,6 +546,9 @@ do {									      \
  * @c: The conditions under which the dereference will take place
  *
  * This is the RCU-sched counterpart to rcu_dereference_check().
+ * However, please note that in recent kernels, synchronize_rcu() waits
+ * for preemption-disabled regions of code in addition to regions of code
+ * demarked by rcu_read_lock() and rcu_read_unlock().
  */
 #define rcu_dereference_sched_check(p, c) \
 	__rcu_dereference_check((p), (c) || rcu_read_lock_sched_held(), \
@@ -634,6 +640,12 @@ do {									      \
  * sections, invocation of the corresponding RCU callback is deferred
  * until after the all the other CPUs exit their critical sections.
  *
+ * In recent kernels, synchronize_rcu() and call_rcu() also wait for
+ * regions of code with preemption disabled, including regions of code
+ * with interrupts or softirqs disabled.  If your kernel is old enough
+ * for synchronize_sched() to be defined, only code enclosed within
+ * rcu_read_lock() and rcu_read_unlock() are guaranteed to be waited for.
+ *
  * Note, however, that RCU callbacks are permitted to run concurrently
  * with new RCU read-side critical sections.  One way that this can happen
  * is via the following sequence of events: (1) CPU 0 enters an RCU
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 9ea1d4eef1ad..0e76bf47d92b 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -3071,12 +3071,13 @@ __call_rcu(struct rcu_head *head, rcu_callback_t func)
  * period elapses, in other words after all pre-existing RCU read-side
  * critical sections have completed.  However, the callback function
  * might well execute concurrently with RCU read-side critical sections
- * that started after call_rcu() was invoked.  RCU read-side critical
- * sections are delimited by rcu_read_lock() and rcu_read_unlock(), and
- * may be nested.  In addition, regions of code across which interrupts,
- * preemption, or softirqs have been disabled also serve as RCU read-side
- * critical sections.  This includes hardware interrupt handlers, softirq
- * handlers, and NMI handlers.
+ * that started after call_rcu() was invoked.
+ *
+ * RCU read-side critical sections are delimited by rcu_read_lock() and
+ * rcu_read_unlock(), and may be nested.  In addition, regions of code
+ * across which interrupts, preemption, or softirqs have been disabled
+ * also serve as RCU read-side critical sections.  This includes hardware
+ * interrupt handlers, softirq handlers, and NMI handlers.
  *
  * Note that all CPUs must agree that the grace period extended beyond
  * all pre-existing RCU read-side critical section.  On systems with more
@@ -3771,12 +3772,13 @@ static int rcu_blocking_is_gp(void)
  * read-side critical sections have completed.  Note, however, that
  * upon return from synchronize_rcu(), the caller might well be executing
  * concurrently with new RCU read-side critical sections that began while
- * synchronize_rcu() was waiting.  RCU read-side critical sections are
- * delimited by rcu_read_lock() and rcu_read_unlock(), and may be nested.
- * In addition, regions of code across which interrupts, preemption, or
- * softirqs have been disabled also serve as RCU read-side critical
- * sections.  This includes hardware interrupt handlers, softirq handlers,
- * and NMI handlers.
+ * synchronize_rcu() was waiting.
+ *
+ * RCU read-side critical sections are delimited by rcu_read_lock() and
+ * rcu_read_unlock(), and may be nested.  In addition, regions of code
+ * across which interrupts, preemption, or softirqs have been disabled
+ * also serve as RCU read-side critical sections.  This includes hardware
+ * interrupt handlers, softirq handlers, and NMI handlers.
  *
  * Note that this guarantee implies further memory-ordering guarantees.
  * On systems with more than one CPU, when synchronize_rcu() returns,

Re: [RFC PATCH 13/37] mm: implement speculative handling in __handle_mm_fault().

[Matthew Wilcox]

On Thu, Apr 29, 2021 at 11:34:12AM -0700, Paul E. McKenney wrote:
> +++ b/include/linux/rcupdate.h
> @@ -532,7 +532,10 @@ do {									      \
>   * @p: The pointer to read, prior to dereferencing
>   * @c: The conditions under which the dereference will take place
>   *
> - * This is the RCU-bh counterpart to rcu_dereference_check().
> + * This is the RCU-bh counterpart to rcu_dereference_check().  However,
> + * please note that in recent kernels, synchronize_rcu() waits for
> + * local_bh_disable() regions of code in addition to regions of code
> + * demarked by rcu_read_lock() and rcu_read_unlock().
>   */

I've been trying to get rid of "please note that" in my own documentation
recently.  It doesn't add any value.  Also, "recent kernels" is going to
go stale quickly, "Since v5.8" (or whatever) is good because it lets us
know in ten years that we can just delete the reference.

So I'd make this:

 * This is the RCU-bh equivalent of rcu_dereference_check().  Since v5.8,
 * synchronize_rcu() waits for code with bottom halves disabled as well
 * as code between rcu_read_lock() and rcu_read_unlock().

Re: [RFC PATCH 13/37] mm: implement speculative handling in __handle_mm_fault().

[Paul E. McKenney]

On Thu, Apr 29, 2021 at 07:49:08PM +0100, Matthew Wilcox wrote:
> On Thu, Apr 29, 2021 at 11:34:12AM -0700, Paul E. McKenney wrote:
> > +++ b/include/linux/rcupdate.h
> > @@ -532,7 +532,10 @@ do {									      \
> >   * @p: The pointer to read, prior to dereferencing
> >   * @c: The conditions under which the dereference will take place
> >   *
> > - * This is the RCU-bh counterpart to rcu_dereference_check().
> > + * This is the RCU-bh counterpart to rcu_dereference_check().  However,
> > + * please note that in recent kernels, synchronize_rcu() waits for
> > + * local_bh_disable() regions of code in addition to regions of code
> > + * demarked by rcu_read_lock() and rcu_read_unlock().
> >   */
> 
> I've been trying to get rid of "please note that" in my own documentation
> recently.  It doesn't add any value.  Also, "recent kernels" is going to
> go stale quickly, "Since v5.8" (or whatever) is good because it lets us
> know in ten years that we can just delete the reference.
> 
> So I'd make this:
> 
>  * This is the RCU-bh equivalent of rcu_dereference_check().  Since v5.8,
>  * synchronize_rcu() waits for code with bottom halves disabled as well
>  * as code between rcu_read_lock() and rcu_read_unlock().

Normally, I would be right there with you on the "less is more"
approach to writing.  But in this particular case:

1.	I added comments to rcu_read_lock_bh(), rcu_read_lock_sched(),
	call_rcu(), and synchronize_rcu().

2.	I included a section entitled "RCU flavor consolidation" in the
	2019 edition of the RCU API: https://lwn.net/Articles/777036/

3.	I presented on this topic at LCA:
	https://www.youtube.com/watch?v=hZX1aokdNiY

4.	I published a paper on this topic:
	https://dl.acm.org/doi/10.1145/3319647.3325836
	http://www.rdrop.com/~paulmck/RCU/rcu-exploit.2019.05.01a.pdf

All of these, even taken together, have proven to be insufficient.
This therefore does not appear to be the place to economize on words.  :-/

Your point on the version (v5.0, as it turns out) is right on, and I
will make that change.

							Thanx, Paul

Re: [RFC PATCH 13/37] mm: implement speculative handling in __handle_mm_fault().

[Michel Lespinasse]

On Thu, Apr 29, 2021 at 11:34:12AM -0700, Paul E. McKenney wrote:
> ------------------------------------------------------------------------
> 
> commit 97262c64c2cf807bf06825e454c4bedd228fadfb
> Author: Paul E. McKenney <paulmck@kernel.org>
> Date:   Thu Apr 29 11:18:01 2021 -0700
> 
>     rcu: Improve comments describing RCU read-side critical sections
>     
>     There are a number of places that call out the fact that preempt-disable
>     regions of code now act as RCU read-side critical sections, where
>     preempt-disable regions of code include irq-disable regions of code,
>     bh-disable regions of code, hardirq handlers, and NMI handlers.  However,
>     someone relying solely on (for example) the call_rcu() header comment
>     might well have no idea that preempt-disable regions of code have RCU
>     semantics.
>     
>     This commit therefore updates the header comments for
>     call_rcu(), synchronize_rcu(), rcu_dereference_bh_check(), and
>     rcu_dereference_sched_check() to call out these new(ish) forms of RCU
>     readers.
>     
>     Reported-by: Michel Lespinasse <michel@lespinasse.org>
>     Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
> 
> diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
> index a10480f2b4ef..c01b04ad64c4 100644
> --- a/include/linux/rcupdate.h
> +++ b/include/linux/rcupdate.h
> @@ -532,7 +532,10 @@ do {									      \
>   * @p: The pointer to read, prior to dereferencing
>   * @c: The conditions under which the dereference will take place
>   *
> - * This is the RCU-bh counterpart to rcu_dereference_check().
> + * This is the RCU-bh counterpart to rcu_dereference_check().  However,
> + * please note that in recent kernels, synchronize_rcu() waits for
> + * local_bh_disable() regions of code in addition to regions of code
> + * demarked by rcu_read_lock() and rcu_read_unlock().

Two things:
- "recent kernels" could be clarified, as Matthew pointed out
- The above is not 100% clear if call_rcu() also waits for
  local_bh_disable() regions of code ? (you did clarify this in tree.c
  but I think it's better to have that here as well)

>   */
>  #define rcu_dereference_bh_check(p, c) \
>  	__rcu_dereference_check((p), (c) || rcu_read_lock_bh_held(), __rcu)
> @@ -543,6 +546,9 @@ do {									      \
>   * @c: The conditions under which the dereference will take place
>   *
>   * This is the RCU-sched counterpart to rcu_dereference_check().
> + * However, please note that in recent kernels, synchronize_rcu() waits
> + * for preemption-disabled regions of code in addition to regions of code
> + * demarked by rcu_read_lock() and rcu_read_unlock().

Same comments regarding "recent kernels" and call_rcu() here.

>   */
>  #define rcu_dereference_sched_check(p, c) \
>  	__rcu_dereference_check((p), (c) || rcu_read_lock_sched_held(), \
> @@ -634,6 +640,12 @@ do {									      \
>   * sections, invocation of the corresponding RCU callback is deferred
>   * until after the all the other CPUs exit their critical sections.
>   *
> + * In recent kernels, synchronize_rcu() and call_rcu() also wait for
> + * regions of code with preemption disabled, including regions of code
> + * with interrupts or softirqs disabled.  If your kernel is old enough
> + * for synchronize_sched() to be defined, only code enclosed within
> + * rcu_read_lock() and rcu_read_unlock() are guaranteed to be waited for.
> + *

Thanks, this is the quote I was looking for, and also I think it's
important for it to be in rcupdate.h rather than any .c implementation
(I think it's more natural to look at headers for this kind of stuff).

Same comment regarding "old enough" / "recent kernels" though.

>   * Note, however, that RCU callbacks are permitted to run concurrently
>   * with new RCU read-side critical sections.  One way that this can happen
>   * is via the following sequence of events: (1) CPU 0 enters an RCU
> diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c

The tree.c changes look fine to me.

Thanks a lot for looking into this !

--
Michel "walken" Lespinasse

Re: [RFC PATCH 13/37] mm: implement speculative handling in __handle_mm_fault().

[Paul E. McKenney]

On Thu, Apr 29, 2021 at 02:17:58PM -0700, Michel Lespinasse wrote:
> On Thu, Apr 29, 2021 at 11:34:12AM -0700, Paul E. McKenney wrote:
> > ------------------------------------------------------------------------
> > 
> > commit 97262c64c2cf807bf06825e454c4bedd228fadfb
> > Author: Paul E. McKenney <paulmck@kernel.org>
> > Date:   Thu Apr 29 11:18:01 2021 -0700
> > 
> >     rcu: Improve comments describing RCU read-side critical sections
> >     
> >     There are a number of places that call out the fact that preempt-disable
> >     regions of code now act as RCU read-side critical sections, where
> >     preempt-disable regions of code include irq-disable regions of code,
> >     bh-disable regions of code, hardirq handlers, and NMI handlers.  However,
> >     someone relying solely on (for example) the call_rcu() header comment
> >     might well have no idea that preempt-disable regions of code have RCU
> >     semantics.
> >     
> >     This commit therefore updates the header comments for
> >     call_rcu(), synchronize_rcu(), rcu_dereference_bh_check(), and
> >     rcu_dereference_sched_check() to call out these new(ish) forms of RCU
> >     readers.
> >     
> >     Reported-by: Michel Lespinasse <michel@lespinasse.org>
> >     Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
> > 
> > diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
> > index a10480f2b4ef..c01b04ad64c4 100644
> > --- a/include/linux/rcupdate.h
> > +++ b/include/linux/rcupdate.h
> > @@ -532,7 +532,10 @@ do {									      \
> >   * @p: The pointer to read, prior to dereferencing
> >   * @c: The conditions under which the dereference will take place
> >   *
> > - * This is the RCU-bh counterpart to rcu_dereference_check().
> > + * This is the RCU-bh counterpart to rcu_dereference_check().  However,
> > + * please note that in recent kernels, synchronize_rcu() waits for
> > + * local_bh_disable() regions of code in addition to regions of code
> > + * demarked by rcu_read_lock() and rcu_read_unlock().
> 
> Two things:
> - "recent kernels" could be clarified, as Matthew pointed out
> - The above is not 100% clear if call_rcu() also waits for
>   local_bh_disable() regions of code ? (you did clarify this in tree.c
>   but I think it's better to have that here as well)

Good points, I updated both.

> >   */
> >  #define rcu_dereference_bh_check(p, c) \
> >  	__rcu_dereference_check((p), (c) || rcu_read_lock_bh_held(), __rcu)
> > @@ -543,6 +546,9 @@ do {									      \
> >   * @c: The conditions under which the dereference will take place
> >   *
> >   * This is the RCU-sched counterpart to rcu_dereference_check().
> > + * However, please note that in recent kernels, synchronize_rcu() waits
> > + * for preemption-disabled regions of code in addition to regions of code
> > + * demarked by rcu_read_lock() and rcu_read_unlock().
> 
> Same comments regarding "recent kernels" and call_rcu() here.

And here as well.

> >   */
> >  #define rcu_dereference_sched_check(p, c) \
> >  	__rcu_dereference_check((p), (c) || rcu_read_lock_sched_held(), \
> > @@ -634,6 +640,12 @@ do {									      \
> >   * sections, invocation of the corresponding RCU callback is deferred
> >   * until after the all the other CPUs exit their critical sections.
> >   *
> > + * In recent kernels, synchronize_rcu() and call_rcu() also wait for
> > + * regions of code with preemption disabled, including regions of code
> > + * with interrupts or softirqs disabled.  If your kernel is old enough
> > + * for synchronize_sched() to be defined, only code enclosed within
> > + * rcu_read_lock() and rcu_read_unlock() are guaranteed to be waited for.
> > + *
> 
> Thanks, this is the quote I was looking for, and also I think it's
> important for it to be in rcupdate.h rather than any .c implementation
> (I think it's more natural to look at headers for this kind of stuff).
> 
> Same comment regarding "old enough" / "recent kernels" though.
> 
> >   * Note, however, that RCU callbacks are permitted to run concurrently
> >   * with new RCU read-side critical sections.  One way that this can happen
> >   * is via the following sequence of events: (1) CPU 0 enters an RCU
> > diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
> 
> The tree.c changes look fine to me.

I added the version here also.

> Thanks a lot for looking into this !

And here is the updated commit.  Thoughts?

							Thanx, Paul

------------------------------------------------------------------------

commit cc5a0ad5aa52d26379d5cd04d0a8f0917caf7365
Author: Paul E. McKenney <paulmck@kernel.org>
Date:   Thu Apr 29 11:18:01 2021 -0700

    rcu: Improve comments describing RCU read-side critical sections
    
    There are a number of places that call out the fact that preempt-disable
    regions of code now act as RCU read-side critical sections, where
    preempt-disable regions of code include irq-disable regions of code,
    bh-disable regions of code, hardirq handlers, and NMI handlers.  However,
    someone relying solely on (for example) the call_rcu() header comment
    might well have no idea that preempt-disable regions of code have RCU
    semantics.
    
    This commit therefore updates the header comments for
    call_rcu(), synchronize_rcu(), rcu_dereference_bh_check(), and
    rcu_dereference_sched_check() to call out these new(ish) forms of RCU
    readers.
    
    Reported-by: Michel Lespinasse <michel@lespinasse.org>
    [ paulmck: Apply Matthew Wilcox and Michel Lespinasse feedback. ]
    Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index a10480f2b4ef..adc2043e92db 100644
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -532,7 +532,12 @@ do {									      \
  * @p: The pointer to read, prior to dereferencing
  * @c: The conditions under which the dereference will take place
  *
- * This is the RCU-bh counterpart to rcu_dereference_check().
+ * This is the RCU-bh counterpart to rcu_dereference_check().  However,
+ * please note that starting in v5.0 kernels, vanilla RCU grace periods
+ * wait for local_bh_disable() regions of code in addition to regions of
+ * code demarked by rcu_read_lock() and rcu_read_unlock().  This means
+ * that synchronize_rcu(), call_rcu, and friends all take not only
+ * rcu_read_lock() but also rcu_read_lock_bh() into account.
  */
 #define rcu_dereference_bh_check(p, c) \
 	__rcu_dereference_check((p), (c) || rcu_read_lock_bh_held(), __rcu)
@@ -543,6 +548,11 @@ do {									      \
  * @c: The conditions under which the dereference will take place
  *
  * This is the RCU-sched counterpart to rcu_dereference_check().
+ * However, please note that starting in v5.0 kernels, vanilla RCU grace
+ * periods wait for preempt_disable() regions of code in addition to
+ * regions of code demarked by rcu_read_lock() and rcu_read_unlock().
+ * This means that synchronize_rcu(), call_rcu, and friends all take not
+ * only rcu_read_lock() but also rcu_read_lock_sched() into account.
  */
 #define rcu_dereference_sched_check(p, c) \
 	__rcu_dereference_check((p), (c) || rcu_read_lock_sched_held(), \
@@ -634,6 +644,12 @@ do {									      \
  * sections, invocation of the corresponding RCU callback is deferred
  * until after the all the other CPUs exit their critical sections.
  *
+ * In recent kernels, synchronize_rcu() and call_rcu() also wait for
+ * regions of code with preemption disabled, including regions of code
+ * with interrupts or softirqs disabled.  If your kernel is old enough
+ * for synchronize_sched() to be defined, only code enclosed within
+ * rcu_read_lock() and rcu_read_unlock() are guaranteed to be waited for.
+ *
  * Note, however, that RCU callbacks are permitted to run concurrently
  * with new RCU read-side critical sections.  One way that this can happen
  * is via the following sequence of events: (1) CPU 0 enters an RCU
@@ -728,9 +744,11 @@ static inline void rcu_read_unlock(void)
 /**
  * rcu_read_lock_bh() - mark the beginning of an RCU-bh critical section
  *
- * This is equivalent of rcu_read_lock(), but also disables softirqs.
- * Note that anything else that disables softirqs can also serve as
- * an RCU read-side critical section.
+ * This is equivalent to rcu_read_lock(), but also disables softirqs.
+ * Note that anything else that disables softirqs can also serve as an RCU
+ * read-side critical section.  However, please note that this equivalence
+ * applies only to v5.0 and later.  Before v5.0, rcu_read_lock() and
+ * rcu_read_lock_bh() were unrelated.
  *
  * Note that rcu_read_lock_bh() and the matching rcu_read_unlock_bh()
  * must occur in the same context, for example, it is illegal to invoke
@@ -763,9 +781,12 @@ static inline void rcu_read_unlock_bh(void)
 /**
  * rcu_read_lock_sched() - mark the beginning of a RCU-sched critical section
  *
- * This is equivalent of rcu_read_lock(), but disables preemption.
- * Read-side critical sections can also be introduced by anything else
- * that disables preemption, including local_irq_disable() and friends.
+ * This is equivalent to rcu_read_lock(), but also disables preemption.
+ * Read-side critical sections can also be introduced by anything else that
+ * disables preemption, including local_irq_disable() and friends.  However,
+ * please note that the equivalence to rcu_read_lock() applies only to
+ * v5.0 and later.  Before v5.0, rcu_read_lock() and rcu_read_lock_sched()
+ * were unrelated.
  *
  * Note that rcu_read_lock_sched() and the matching rcu_read_unlock_sched()
  * must occur in the same context, for example, it is illegal to invoke
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 9ea1d4eef1ad..9089c23e80dc 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -3071,12 +3071,14 @@ __call_rcu(struct rcu_head *head, rcu_callback_t func)
  * period elapses, in other words after all pre-existing RCU read-side
  * critical sections have completed.  However, the callback function
  * might well execute concurrently with RCU read-side critical sections
- * that started after call_rcu() was invoked.  RCU read-side critical
- * sections are delimited by rcu_read_lock() and rcu_read_unlock(), and
- * may be nested.  In addition, regions of code across which interrupts,
- * preemption, or softirqs have been disabled also serve as RCU read-side
- * critical sections.  This includes hardware interrupt handlers, softirq
- * handlers, and NMI handlers.
+ * that started after call_rcu() was invoked.
+ *
+ * RCU read-side critical sections are delimited by rcu_read_lock()
+ * and rcu_read_unlock(), and may be nested.  In addition, but only in
+ * v5.0 and later, regions of code across which interrupts, preemption,
+ * or softirqs have been disabled also serve as RCU read-side critical
+ * sections.  This includes hardware interrupt handlers, softirq handlers,
+ * and NMI handlers.
  *
  * Note that all CPUs must agree that the grace period extended beyond
  * all pre-existing RCU read-side critical section.  On systems with more
@@ -3771,10 +3773,12 @@ static int rcu_blocking_is_gp(void)
  * read-side critical sections have completed.  Note, however, that
  * upon return from synchronize_rcu(), the caller might well be executing
  * concurrently with new RCU read-side critical sections that began while
- * synchronize_rcu() was waiting.  RCU read-side critical sections are
- * delimited by rcu_read_lock() and rcu_read_unlock(), and may be nested.
- * In addition, regions of code across which interrupts, preemption, or
- * softirqs have been disabled also serve as RCU read-side critical
+ * synchronize_rcu() was waiting.
+ *
+ * RCU read-side critical sections are delimited by rcu_read_lock()
+ * and rcu_read_unlock(), and may be nested.  In addition, but only in
+ * v5.0 and later, regions of code across which interrupts, preemption,
+ * or softirqs have been disabled also serve as RCU read-side critical
  * sections.  This includes hardware interrupt handlers, softirq handlers,
  * and NMI handlers.
  *

Re: [RFC PATCH 13/37] mm: implement speculative handling in __handle_mm_fault().

[Michel Lespinasse]

On Sun, May 02, 2021 at 08:40:49PM -0700, Paul E. McKenney wrote:
> @@ -634,6 +644,12 @@ do {									      \
>   * sections, invocation of the corresponding RCU callback is deferred
>   * until after the all the other CPUs exit their critical sections.
>   *
> + * In recent kernels, synchronize_rcu() and call_rcu() also wait for
> + * regions of code with preemption disabled, including regions of code
> + * with interrupts or softirqs disabled.  If your kernel is old enough
> + * for synchronize_sched() to be defined, only code enclosed within
> + * rcu_read_lock() and rcu_read_unlock() are guaranteed to be waited for.
> + *
>   * Note, however, that RCU callbacks are permitted to run concurrently
>   * with new RCU read-side critical sections.  One way that this can happen
>   * is via the following sequence of events: (1) CPU 0 enters an RCU

You still have "old enough" / "recent kernels" here. But maybe it's OK
given that you added relevant version numbers elsewhere.

Everything else looks great to me.

Thanks,

--
Michel "walken" Lespinasse

Re: [RFC PATCH 13/37] mm: implement speculative handling in __handle_mm_fault().

[Paul E. McKenney]

On Sun, May 02, 2021 at 09:34:30PM -0700, Michel Lespinasse wrote:
> On Sun, May 02, 2021 at 08:40:49PM -0700, Paul E. McKenney wrote:
> > @@ -634,6 +644,12 @@ do {									      \
> >   * sections, invocation of the corresponding RCU callback is deferred
> >   * until after the all the other CPUs exit their critical sections.
> >   *
> > + * In recent kernels, synchronize_rcu() and call_rcu() also wait for
> > + * regions of code with preemption disabled, including regions of code
> > + * with interrupts or softirqs disabled.  If your kernel is old enough
> > + * for synchronize_sched() to be defined, only code enclosed within
> > + * rcu_read_lock() and rcu_read_unlock() are guaranteed to be waited for.
> > + *
> >   * Note, however, that RCU callbacks are permitted to run concurrently
> >   * with new RCU read-side critical sections.  One way that this can happen
> >   * is via the following sequence of events: (1) CPU 0 enters an RCU
> 
> You still have "old enough" / "recent kernels" here. But maybe it's OK
> given that you added relevant version numbers elsewhere.
> 
> Everything else looks great to me.

Good point!  Like this?

							Thanx, Paul

------------------------------------------------------------------------

commit fd8393a2a8a5ffd25d0766abb262137c36bda9f3
Author: Paul E. McKenney <paulmck@kernel.org>
Date:   Mon May 3 09:32:14 2021 -0700

    fixup! rcu: Improve comments describing RCU read-side critical sections
    
    Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index 901ab6fa252b..323954363389 100644
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -644,11 +644,11 @@ do {									      \
  * sections, invocation of the corresponding RCU callback is deferred
  * until after the all the other CPUs exit their critical sections.
  *
- * In recent kernels, synchronize_rcu() and call_rcu() also wait for
- * regions of code with preemption disabled, including regions of code
- * with interrupts or softirqs disabled.  If your kernel is old enough
- * for synchronize_sched() to be defined, only code enclosed within
- * rcu_read_lock() and rcu_read_unlock() are guaranteed to be waited for.
+ * In v5.0 and later kernels, synchronize_rcu() and call_rcu() also
+ * wait for regions of code with preemption disabled, including regions of
+ * code with interrupts or softirqs disabled.  In pre-v5.0 kernels, which
+ * define synchronize_sched(), only code enclosed within rcu_read_lock()
+ * and rcu_read_unlock() are guaranteed to be waited for.
  *
  * Note, however, that RCU callbacks are permitted to run concurrently
  * with new RCU read-side critical sections.  One way that this can happen

[RFC PATCH 14/37] mm: add pte_map_lock() and pte_spinlock()

[Michel Lespinasse]

pte_map_lock() and pte_spinlock() are used by fault handlers to ensure
the pte is mapped and locked before they commit the faulted page to the
mm's address space at the end of the fault.

The functions differ in their preconditions; pte_map_lock() expects
the pte to be unmapped prior to the call, while pte_spinlock() expects
it to be already mapped.

In the speculative fault case, the functions verify, after locking the pte,
that the mmap sequence count has not changed since the start of the fault,
and thus that no mmap lock writers have been running concurrently with
the fault. After that point the page table lock serializes any further
races with concurrent mmap lock writers.

If the mmap sequence count check fails, both functions will return false
with the pte being left unmapped and unlocked.

Signed-off-by: Michel Lespinasse <michel@lespinasse.org>
---
 include/linux/mm.h | 34 ++++++++++++++++++++++
 mm/memory.c        | 71 ++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 105 insertions(+)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index dee8a4833779..f26490aff514 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -3183,5 +3183,39 @@ extern int sysctl_nr_trim_pages;
 
 void mem_dump_obj(void *object);
 
+#ifdef CONFIG_SPECULATIVE_PAGE_FAULT
+
+bool __pte_map_lock(struct vm_fault *vmf);
+
+static inline bool pte_map_lock(struct vm_fault *vmf)
+{
+	VM_BUG_ON(vmf->pte);
+	return __pte_map_lock(vmf);
+}
+
+static inline bool pte_spinlock(struct vm_fault *vmf)
+{
+	VM_BUG_ON(!vmf->pte);
+	return __pte_map_lock(vmf);
+}
+
+#else	/* !CONFIG_SPECULATIVE_PAGE_FAULT */
+
+static inline bool pte_map_lock(struct vm_fault *vmf)
+{
+	vmf->pte = pte_offset_map_lock(vmf->vma->vm_mm, vmf->pmd, vmf->address,
+				       &vmf->ptl);
+	return true;
+}
+
+static inline bool pte_spinlock(struct vm_fault *vmf)
+{
+	vmf->ptl = pte_lockptr(vmf->vma->vm_mm, vmf->pmd);
+	spin_lock(vmf->ptl);
+	return true;
+}
+
+#endif	/* CONFIG_SPECULATIVE_PAGE_FAULT */
+
 #endif /* __KERNEL__ */
 #endif /* _LINUX_MM_H */
diff --git a/mm/memory.c b/mm/memory.c
index a17704aac019..3e192d5f89a6 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -2566,6 +2566,77 @@ int apply_to_existing_page_range(struct mm_struct *mm, unsigned long addr,
 }
 EXPORT_SYMBOL_GPL(apply_to_existing_page_range);
 
+#ifdef CONFIG_SPECULATIVE_PAGE_FAULT
+
+bool __pte_map_lock(struct vm_fault *vmf)
+{
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+	pmd_t pmdval;
+#endif
+	pte_t *pte = vmf->pte;
+	spinlock_t *ptl;
+
+	if (!(vmf->flags & FAULT_FLAG_SPECULATIVE)) {
+		vmf->ptl = pte_lockptr(vmf->vma->vm_mm, vmf->pmd);
+		if (!pte)
+			vmf->pte = pte_offset_map(vmf->pmd, vmf->address);
+		spin_lock(vmf->ptl);
+		return true;
+	}
+
+	local_irq_disable();
+	if (!mmap_seq_read_check(vmf->vma->vm_mm, vmf->seq))
+		goto fail;
+	/*
+	 * The mmap sequence count check guarantees that the page
+	 * tables are still valid at that point, and having IRQs
+	 * disabled ensures that they stay around (see Fast GUP
+	 * comment in mm/gup.c).
+	 */
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+	/*
+	 * We check if the pmd value is still the same to ensure that there
+	 * is not a huge collapse operation in progress in our back.
+	 */
+	pmdval = READ_ONCE(*vmf->pmd);
+	if (!pmd_same(pmdval, vmf->orig_pmd))
+		goto fail;
+#endif
+	ptl = pte_lockptr(vmf->vma->vm_mm, vmf->pmd);
+	if (!pte)
+		pte = pte_offset_map(vmf->pmd, vmf->address);
+	/*
+	 * Try locking the page table.
+	 *
+	 * Note that we might race against zap_pte_range() which
+	 * invalidates TLBs while holding the page table lock.
+	 * We still have local IRQs disabled here to prevent the
+	 * page table from being reclaimed, and zap_pte_range() could
+	 * thus deadlock with us if we tried using spin_lock() here.
+	 *
+	 * We also don't want to retry until spin_trylock() succeeds,
+	 * because of the starvation potential against a stream of lockers.
+	 */
+	if (unlikely(!spin_trylock(ptl)))
+		goto fail;
+	if (!mmap_seq_read_check(vmf->vma->vm_mm, vmf->seq))
+		goto unlock_fail;
+	local_irq_enable();
+	vmf->pte = pte;
+	vmf->ptl = ptl;
+	return true;
+
+unlock_fail:
+	spin_unlock(ptl);
+fail:
+	if (pte)
+		pte_unmap(pte);
+	local_irq_enable();
+	return false;
+}
+
+#endif	/* CONFIG_SPECULATIVE_PAGE_FAULT */
+
 /*
  * handle_pte_fault chooses page fault handler according to an entry which was
  * read non-atomically.  Before making any commitment, on those architectures
-- 
2.20.1

[RFC PATCH 15/37] mm: implement speculative handling in do_anonymous_page()

[Michel Lespinasse]

Change do_anonymous_page() to handle the speculative case.
This involves aborting speculative faults if they have to allocate a new
anon_vma, and using pte_map_lock() instead of pte_offset_map_lock()
to complete the page fault.

Signed-off-by: Michel Lespinasse <michel@lespinasse.org>
---
 mm/memory.c | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/mm/memory.c b/mm/memory.c
index 3e192d5f89a6..fd84576f9c01 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -3598,8 +3598,12 @@ static vm_fault_t do_anonymous_page(struct vm_fault *vmf)
 						vma->vm_page_prot));
 	} else {
 		/* Allocate our own private page. */
-		if (unlikely(anon_vma_prepare(vma)))
-			goto oom;
+		if (unlikely(!vma->anon_vma)) {
+			if (vmf->flags & FAULT_FLAG_SPECULATIVE)
+				return VM_FAULT_RETRY;
+			if (__anon_vma_prepare(vma))
+				goto oom;
+		}
 		page = alloc_zeroed_user_highpage_movable(vma, vmf->address);
 		if (!page)
 			goto oom;
@@ -3620,8 +3624,10 @@ static vm_fault_t do_anonymous_page(struct vm_fault *vmf)
 			entry = pte_mkwrite(pte_mkdirty(entry));
 	}
 
-	vmf->pte = pte_offset_map_lock(vma->vm_mm, vmf->pmd, vmf->address,
-			&vmf->ptl);
+	if (!pte_map_lock(vmf)) {
+		ret = VM_FAULT_RETRY;
+		goto release;
+	}
 	if (!pte_none(*vmf->pte)) {
 		update_mmu_tlb(vma, vmf->address, vmf->pte);
 		goto unlock;
@@ -3636,6 +3642,8 @@ static vm_fault_t do_anonymous_page(struct vm_fault *vmf)
 		pte_unmap_unlock(vmf->pte, vmf->ptl);
 		if (page)
 			put_page(page);
+		if (vmf->flags & FAULT_FLAG_SPECULATIVE)
+			return VM_FAULT_RETRY;
 		return handle_userfault(vmf, VM_UFFD_MISSING);
 	}
 
@@ -3653,6 +3661,7 @@ static vm_fault_t do_anonymous_page(struct vm_fault *vmf)
 	return 0;
 unlock:
 	pte_unmap_unlock(vmf->pte, vmf->ptl);
+release:
 	if (page)
 		put_page(page);
 	return ret;
-- 
2.20.1

[RFC PATCH 16/37] mm: enable speculative fault handling through do_anonymous_page()

[Michel Lespinasse]

in x86 fault handler, only attempt spf if the vma is anonymous.

In do_handle_mm_fault(), let speculative page faults proceed as long
as they fall into anonymous vmas. This enables the speculative
handling code in __handle_mm_fault() and do_anonymous_page().

In handle_pte_fault(), if vmf->pte is set (the original pte was not
pte_none), catch speculative faults and return VM_FAULT_RETRY as
those cases are not implemented yet. Also assert that do_fault()
is not reached in the speculative case.

Signed-off-by: Michel Lespinasse <michel@lespinasse.org>
---
 arch/x86/mm/fault.c |  2 +-
 mm/memory.c         | 16 ++++++++++++----
 2 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index f8c8e325af77..fbf265f56a06 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -1324,7 +1324,7 @@ void do_user_addr_fault(struct pt_regs *regs,
 		goto spf_abort;
 	rcu_read_lock();
 	vma = find_vma(mm, address);
-	if (!vma || vma->vm_start > address) {
+	if (!vma || vma->vm_start > address || !vma_is_anonymous(vma)) {
 		rcu_read_unlock();
 		goto spf_abort;
 	}
diff --git a/mm/memory.c b/mm/memory.c
index fd84576f9c01..a2c5bf29f989 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -4103,6 +4103,8 @@ static vm_fault_t do_fault(struct vm_fault *vmf)
 	struct mm_struct *vm_mm = vma->vm_mm;
 	vm_fault_t ret;
 
+	VM_BUG_ON(vmf->flags & FAULT_FLAG_SPECULATIVE);
+
 	/*
 	 * The VMA was not fully populated on mmap() or missing VM_DONTEXPAND
 	 */
@@ -4340,6 +4342,11 @@ static vm_fault_t handle_pte_fault(struct vm_fault *vmf)
 			return do_fault(vmf);
 	}
 
+	if (vmf->flags & FAULT_FLAG_SPECULATIVE) {
+		pte_unmap(vmf->pte);
+		return VM_FAULT_RETRY;
+	}
+
 	if (!pte_present(vmf->orig_pte))
 		return do_swap_page(vmf);
 
@@ -4668,8 +4675,7 @@ vm_fault_t do_handle_mm_fault(struct vm_area_struct *vma,
 {
 	vm_fault_t ret;
 
-	if (flags & FAULT_FLAG_SPECULATIVE)
-		return VM_FAULT_RETRY;
+	VM_BUG_ON((flags & FAULT_FLAG_SPECULATIVE) && !vma_is_anonymous(vma));
 
 	__set_current_state(TASK_RUNNING);
 
@@ -4691,10 +4697,12 @@ vm_fault_t do_handle_mm_fault(struct vm_area_struct *vma,
 	if (flags & FAULT_FLAG_USER)
 		mem_cgroup_enter_user_fault();
 
-	if (unlikely(is_vm_hugetlb_page(vma)))
+	if (unlikely(is_vm_hugetlb_page(vma))) {
+		VM_BUG_ON(flags & FAULT_FLAG_SPECULATIVE);
 		ret = hugetlb_fault(vma->vm_mm, vma, address, flags);
-	else
+	} else {
 		ret = __handle_mm_fault(vma, address, flags, seq);
+	}
 
 	if (flags & FAULT_FLAG_USER) {
 		mem_cgroup_exit_user_fault();
-- 
2.20.1

[RFC PATCH 17/37] mm: implement speculative handling in do_numa_page()

[Michel Lespinasse]

change do_numa_page() to use pte_spinlock() when locking the page table,
so that the mmap sequence counter will be validated in the speculative case.

Signed-off-by: Michel Lespinasse <michel@lespinasse.org>
---
 mm/memory.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/memory.c b/mm/memory.c
index a2c5bf29f989..78cc36749754 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -4181,8 +4181,8 @@ static vm_fault_t do_numa_page(struct vm_fault *vmf)
 	 * validation through pte_unmap_same(). It's of NUMA type but
 	 * the pfn may be screwed if the read is non atomic.
 	 */
-	vmf->ptl = pte_lockptr(vma->vm_mm, vmf->pmd);
-	spin_lock(vmf->ptl);
+	if (!pte_spinlock(vmf))
+		return VM_FAULT_RETRY;
 	if (unlikely(!pte_same(*vmf->pte, vmf->orig_pte))) {
 		pte_unmap_unlock(vmf->pte, vmf->ptl);
 		goto out;
-- 
2.20.1

[RFC PATCH 18/37] mm: enable speculative fault handling in do_numa_page()

[Michel Lespinasse]

Change handle_pte_fault() to allow speculative fault execution to proceed
through do_numa_page().

do_swap_page() does not implement speculative execution yet, so it
needs to abort with VM_FAULT_RETRY in that case.

Signed-off-by: Michel Lespinasse <michel@lespinasse.org>
---
 mm/memory.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/mm/memory.c b/mm/memory.c
index 78cc36749754..eea72bd78d06 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -3346,6 +3346,11 @@ vm_fault_t do_swap_page(struct vm_fault *vmf)
 	vm_fault_t ret = 0;
 	void *shadow = NULL;
 
+	if (vmf->flags & FAULT_FLAG_SPECULATIVE) {
+		pte_unmap(vmf->pte);
+		return VM_FAULT_RETRY;
+	}
+
 	if (!pte_unmap_same(vma->vm_mm, vmf->pmd, vmf->pte, vmf->orig_pte))
 		goto out;
 
@@ -4342,17 +4347,17 @@ static vm_fault_t handle_pte_fault(struct vm_fault *vmf)
 			return do_fault(vmf);
 	}
 
-	if (vmf->flags & FAULT_FLAG_SPECULATIVE) {
-		pte_unmap(vmf->pte);
-		return VM_FAULT_RETRY;
-	}
-
 	if (!pte_present(vmf->orig_pte))
 		return do_swap_page(vmf);
 
 	if (pte_protnone(vmf->orig_pte) && vma_is_accessible(vmf->vma))
 		return do_numa_page(vmf);
 
+	if (vmf->flags & FAULT_FLAG_SPECULATIVE) {
+		pte_unmap(vmf->pte);
+		return VM_FAULT_RETRY;
+	}
+
 	vmf->ptl = pte_lockptr(vmf->vma->vm_mm, vmf->pmd);
 	spin_lock(vmf->ptl);
 	entry = vmf->orig_pte;
-- 
2.20.1

[RFC PATCH 19/37] mm: implement speculative handling in wp_page_copy()

[Michel Lespinasse]

Change wp_page_copy() to handle the speculative case.
This involves aborting speculative faults if they have to allocate an
anon_vma, and using pte_map_lock() instead of pte_offset_map_lock()
to complete the page fault.

Also change call sites to clear vmf->pte after unmapping the page table,
in order to satisfy pte_map_lock()'s preconditions.

Signed-off-by: Michel Lespinasse <michel@lespinasse.org>
---
 mm/memory.c | 31 ++++++++++++++++++++++---------
 1 file changed, 22 insertions(+), 9 deletions(-)

diff --git a/mm/memory.c b/mm/memory.c
index eea72bd78d06..547d9d0ee962 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -2911,20 +2911,27 @@ static vm_fault_t wp_page_copy(struct vm_fault *vmf)
 	pte_t entry;
 	int page_copied = 0;
 	struct mmu_notifier_range range;
+	vm_fault_t ret = VM_FAULT_OOM;
 
-	if (unlikely(anon_vma_prepare(vma)))
-		goto oom;
+	if (unlikely(!vma->anon_vma)) {
+		if (vmf->flags & FAULT_FLAG_SPECULATIVE) {
+			ret = VM_FAULT_RETRY;
+			goto out;
+		}
+		if (__anon_vma_prepare(vma))
+			goto out;
+	}
 
 	if (is_zero_pfn(pte_pfn(vmf->orig_pte))) {
 		new_page = alloc_zeroed_user_highpage_movable(vma,
 							      vmf->address);
 		if (!new_page)
-			goto oom;
+			goto out;
 	} else {
 		new_page = alloc_page_vma(GFP_HIGHUSER_MOVABLE, vma,
 				vmf->address);
 		if (!new_page)
-			goto oom;
+			goto out;
 
 		if (!cow_user_page(new_page, old_page, vmf)) {
 			/*
@@ -2941,7 +2948,7 @@ static vm_fault_t wp_page_copy(struct vm_fault *vmf)
 	}
 
 	if (mem_cgroup_charge(new_page, mm, GFP_KERNEL))
-		goto oom_free_new;
+		goto out_free_new;
 	cgroup_throttle_swaprate(new_page, GFP_KERNEL);
 
 	__SetPageUptodate(new_page);
@@ -2954,7 +2961,11 @@ static vm_fault_t wp_page_copy(struct vm_fault *vmf)
 	/*
 	 * Re-check the pte - we dropped the lock
 	 */
-	vmf->pte = pte_offset_map_lock(mm, vmf->pmd, vmf->address, &vmf->ptl);
+	if (!pte_map_lock(vmf)) {
+		ret = VM_FAULT_RETRY;
+		/* put_page() will uncharge the page */
+		goto out_free_new;
+	}
 	if (likely(pte_same(*vmf->pte, vmf->orig_pte))) {
 		if (old_page) {
 			if (!PageAnon(old_page)) {
@@ -3042,12 +3053,12 @@ static vm_fault_t wp_page_copy(struct vm_fault *vmf)
 		put_page(old_page);
 	}
 	return page_copied ? VM_FAULT_WRITE : 0;
-oom_free_new:
+out_free_new:
 	put_page(new_page);
-oom:
+out:
 	if (old_page)
 		put_page(old_page);
-	return VM_FAULT_OOM;
+	return ret;
 }
 
 /**
@@ -3190,6 +3201,7 @@ static vm_fault_t do_wp_page(struct vm_fault *vmf)
 			return wp_pfn_shared(vmf);
 
 		pte_unmap_unlock(vmf->pte, vmf->ptl);
+		vmf->pte = NULL;
 		return wp_page_copy(vmf);
 	}
 
@@ -3228,6 +3240,7 @@ static vm_fault_t do_wp_page(struct vm_fault *vmf)
 	get_page(vmf->page);
 
 	pte_unmap_unlock(vmf->pte, vmf->ptl);
+	vmf->pte = NULL;
 	return wp_page_copy(vmf);
 }
 
-- 
2.20.1

[RFC PATCH 20/37] mm: implement and enable speculative fault handling in handle_pte_fault()

[Michel Lespinasse]

In handle_pte_fault(), allow speculative execution to proceed.

Use pte_spinlock() to validate the mmap sequence count when locking
the page table.

If speculative execution proceeds through do_wp_page(), ensure that we
end up in the wp_page_reuse() or wp_page_copy() paths, rather than
wp_pfn_shared() or wp_page_shared() (both unreachable as we only
handle anon vmas so far) or handle_userfault() (needs an explicit
abort to handle non-speculatively).

Signed-off-by: Michel Lespinasse <michel@lespinasse.org>
---
 mm/memory.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/mm/memory.c b/mm/memory.c
index 547d9d0ee962..fc555fae0844 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -3103,6 +3103,7 @@ static vm_fault_t wp_pfn_shared(struct vm_fault *vmf)
 {
 	struct vm_area_struct *vma = vmf->vma;
 
+	VM_BUG_ON(vmf->flags & FAULT_FLAG_SPECULATIVE);
 	if (vma->vm_ops && vma->vm_ops->pfn_mkwrite) {
 		vm_fault_t ret;
 
@@ -3123,6 +3124,8 @@ static vm_fault_t wp_page_shared(struct vm_fault *vmf)
 	struct vm_area_struct *vma = vmf->vma;
 	vm_fault_t ret = VM_FAULT_WRITE;
 
+	VM_BUG_ON(vmf->flags & FAULT_FLAG_SPECULATIVE);
+
 	get_page(vmf->page);
 
 	if (vma->vm_ops && vma->vm_ops->page_mkwrite) {
@@ -3176,6 +3179,8 @@ static vm_fault_t do_wp_page(struct vm_fault *vmf)
 
 	if (userfaultfd_pte_wp(vma, *vmf->pte)) {
 		pte_unmap_unlock(vmf->pte, vmf->ptl);
+		if (vmf->flags & FAULT_FLAG_SPECULATIVE)
+			return VM_FAULT_RETRY;
 		return handle_userfault(vmf, VM_UFFD_WP);
 	}
 
@@ -4366,13 +4371,8 @@ static vm_fault_t handle_pte_fault(struct vm_fault *vmf)
 	if (pte_protnone(vmf->orig_pte) && vma_is_accessible(vmf->vma))
 		return do_numa_page(vmf);
 
-	if (vmf->flags & FAULT_FLAG_SPECULATIVE) {
-		pte_unmap(vmf->pte);
+	if (!pte_spinlock(vmf))
 		return VM_FAULT_RETRY;
-	}
-
-	vmf->ptl = pte_lockptr(vmf->vma->vm_mm, vmf->pmd);
-	spin_lock(vmf->ptl);
 	entry = vmf->orig_pte;
 	if (unlikely(!pte_same(*vmf->pte, entry))) {
 		update_mmu_tlb(vmf->vma, vmf->address, vmf->pte);
-- 
2.20.1

[RFC PATCH 21/37] mm: implement speculative handling in do_swap_page()

[Michel Lespinasse]

If the pte is larger than long, use pte_spinlock() to lock the page table
when verifying the pte - pte_spinlock() is necessary to ensure the page
table is still valid when we are locking it.

Abort speculative faults if the pte is not a swap entry, or if the desired
page is not found in swap cache, to keep things as simple as possible.

Only use trylock when locking the swapped page - again to keep things
simple, and also the usual lock_page_or_retry would otherwise try to
release the mmap lock which is not held in the speculative case.

Use pte_map_lock() to ensure proper synchronization when finally committing
the faulted page to the mm address space.

Signed-off-by: Michel Lespinasse <michel@lespinasse.org>
---
 mm/memory.c | 74 ++++++++++++++++++++++++++++++-----------------------
 1 file changed, 42 insertions(+), 32 deletions(-)

diff --git a/mm/memory.c b/mm/memory.c
index fc555fae0844..ab3160719bf3 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -2637,30 +2637,6 @@ bool __pte_map_lock(struct vm_fault *vmf)
 
 #endif	/* CONFIG_SPECULATIVE_PAGE_FAULT */
 
-/*
- * handle_pte_fault chooses page fault handler according to an entry which was
- * read non-atomically.  Before making any commitment, on those architectures
- * or configurations (e.g. i386 with PAE) which might give a mix of unmatched
- * parts, do_swap_page must check under lock before unmapping the pte and
- * proceeding (but do_wp_page is only called after already making such a check;
- * and do_anonymous_page can safely check later on).
- */
-static inline int pte_unmap_same(struct mm_struct *mm, pmd_t *pmd,
-				pte_t *page_table, pte_t orig_pte)
-{
-	int same = 1;
-#if defined(CONFIG_SMP) || defined(CONFIG_PREEMPTION)
-	if (sizeof(pte_t) > sizeof(unsigned long)) {
-		spinlock_t *ptl = pte_lockptr(mm, pmd);
-		spin_lock(ptl);
-		same = pte_same(*page_table, orig_pte);
-		spin_unlock(ptl);
-	}
-#endif
-	pte_unmap(page_table);
-	return same;
-}
-
 static inline bool cow_user_page(struct page *dst, struct page *src,
 				 struct vm_fault *vmf)
 {
@@ -3369,12 +3345,34 @@ vm_fault_t do_swap_page(struct vm_fault *vmf)
 		return VM_FAULT_RETRY;
 	}
 
-	if (!pte_unmap_same(vma->vm_mm, vmf->pmd, vmf->pte, vmf->orig_pte))
-		goto out;
+#if defined(CONFIG_SMP) || defined(CONFIG_PREEMPTION)
+	if (sizeof(pte_t) > sizeof(unsigned long)) {
+		/*
+		 * vmf->orig_pte was read non-atomically. Before making
+		 * any commitment, on those architectures or configurations
+		 * (e.g. i386 with PAE) which might give a mix of
+		 * unmatched parts, we must check under lock before
+		 * unmapping the pte and proceeding.
+		 *
+		 * (but do_wp_page is only called after already making
+		 * such a check; and do_anonymous_page can safely
+		 * check later on).
+		 */
+		if (!pte_spinlock(vmf))
+			return VM_FAULT_RETRY;
+		if (!pte_same(*vmf->pte, vmf->orig_pte))
+			goto unlock;
+		spin_unlock(vmf->ptl);
+	}
+#endif
+	pte_unmap(vmf->pte);
+	vmf->pte = NULL;
 
 	entry = pte_to_swp_entry(vmf->orig_pte);
 	if (unlikely(non_swap_entry(entry))) {
-		if (is_migration_entry(entry)) {
+		if (vmf->flags & FAULT_FLAG_SPECULATIVE) {
+			ret = VM_FAULT_RETRY;
+		} else if (is_migration_entry(entry)) {
 			migration_entry_wait(vma->vm_mm, vmf->pmd,
 					     vmf->address);
 		} else if (is_device_private_entry(entry)) {
@@ -3395,8 +3393,14 @@ vm_fault_t do_swap_page(struct vm_fault *vmf)
 	swapcache = page;
 
 	if (!page) {
-		struct swap_info_struct *si = swp_swap_info(entry);
+		struct swap_info_struct *si;
 
+		if (vmf->flags & FAULT_FLAG_SPECULATIVE) {
+			delayacct_clear_flag(DELAYACCT_PF_SWAPIN);
+			return VM_FAULT_RETRY;
+		}
+
+		si = swp_swap_info(entry);
 		if (data_race(si->flags & SWP_SYNCHRONOUS_IO) &&
 		    __swap_count(entry) == 1) {
 			/* skip swapcache */
@@ -3459,7 +3463,10 @@ vm_fault_t do_swap_page(struct vm_fault *vmf)
 		goto out_release;
 	}
 
-	locked = lock_page_or_retry(page, vma->vm_mm, vmf->flags);
+	if (vmf->flags & FAULT_FLAG_SPECULATIVE)
+		locked = trylock_page(page);
+	else
+		locked = lock_page_or_retry(page, vma->vm_mm, vmf->flags);
 
 	delayacct_clear_flag(DELAYACCT_PF_SWAPIN);
 	if (!locked) {
@@ -3487,10 +3494,13 @@ vm_fault_t do_swap_page(struct vm_fault *vmf)
 	cgroup_throttle_swaprate(page, GFP_KERNEL);
 
 	/*
-	 * Back out if somebody else already faulted in this pte.
+	 * Back out if the VMA has changed in our back during a speculative
+	 * page fault or if somebody else already faulted in this pte.
 	 */
-	vmf->pte = pte_offset_map_lock(vma->vm_mm, vmf->pmd, vmf->address,
-			&vmf->ptl);
+	if (!pte_map_lock(vmf)) {
+		ret = VM_FAULT_RETRY;
+		goto out_page;
+	}
 	if (unlikely(!pte_same(*vmf->pte, vmf->orig_pte)))
 		goto out_nomap;
 
-- 
2.20.1

[RFC PATCH 22/37] mm: enable speculative fault handling through do_swap_page()

[Michel Lespinasse]

Change do_swap_page() to allow speculative fault execution to proceed.

Signed-off-by: Michel Lespinasse <michel@lespinasse.org>
---
 mm/memory.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/mm/memory.c b/mm/memory.c
index ab3160719bf3..6eddd7b4e89c 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -3340,11 +3340,6 @@ vm_fault_t do_swap_page(struct vm_fault *vmf)
 	vm_fault_t ret = 0;
 	void *shadow = NULL;
 
-	if (vmf->flags & FAULT_FLAG_SPECULATIVE) {
-		pte_unmap(vmf->pte);
-		return VM_FAULT_RETRY;
-	}
-
 #if defined(CONFIG_SMP) || defined(CONFIG_PREEMPTION)
 	if (sizeof(pte_t) > sizeof(unsigned long)) {
 		/*
-- 
2.20.1

[RFC PATCH 23/37] mm: rcu safe vma->vm_file freeing

[Michel Lespinasse]

Defer freeing of vma->vm_file when freeing vmas.
This is to allow speculative page faults in the mapped file case.

Signed-off-by: Michel Lespinasse <michel@lespinasse.org>
---
 fs/exec.c     |  1 +
 kernel/fork.c | 17 +++++++++++++++--
 mm/mmap.c     | 11 +++++++----
 mm/nommu.c    |  6 ++----
 4 files changed, 25 insertions(+), 10 deletions(-)

diff --git a/fs/exec.c b/fs/exec.c
index 18594f11c31f..c9da73eb0f53 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -286,6 +286,7 @@ static int __bprm_mm_init(struct linux_binprm *bprm)
 	mmap_write_unlock(mm);
 err_free:
 	bprm->vma = NULL;
+	VM_BUG_ON(vma->vm_file);
 	vm_area_free(vma);
 	return err;
 }
diff --git a/kernel/fork.c b/kernel/fork.c
index b6078e546114..2f20a5c5fed8 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -369,19 +369,31 @@ struct vm_area_struct *vm_area_dup(struct vm_area_struct *orig)
 	return new;
 }
 
+static inline void ____vm_area_free(struct vm_area_struct *vma)
+{
+	if (vma->vm_file)
+		fput(vma->vm_file);
+	kmem_cache_free(vm_area_cachep, vma);
+}
+
 #ifdef CONFIG_SPECULATIVE_PAGE_FAULT
 static void __vm_area_free(struct rcu_head *head)
 {
 	struct vm_area_struct *vma = container_of(head, struct vm_area_struct,
 						  vm_rcu);
-	kmem_cache_free(vm_area_cachep, vma);
+	____vm_area_free(vma);
 }
 
+#endif
+
 void vm_area_free(struct vm_area_struct *vma)
 {
+#ifdef CONFIG_SPECULATIVE_PAGE_FAULT
 	call_rcu(&vma->vm_rcu, __vm_area_free);
+#else
+	____vm_area_free(vma);
+#endif
 }
-#endif	/* CONFIG_SPECULATIVE_PAGE_FAULT */
 
 static void account_kernel_stack(struct task_struct *tsk, int account)
 {
@@ -621,6 +633,7 @@ static __latent_entropy int dup_mmap(struct mm_struct *mm,
 fail_nomem_anon_vma_fork:
 	mpol_put(vma_policy(tmp));
 fail_nomem_policy:
+	tmp->vm_file = NULL;	/* prevents fput within vm_area_free() */
 	vm_area_free(tmp);
 fail_nomem:
 	retval = -ENOMEM;
diff --git a/mm/mmap.c b/mm/mmap.c
index 3f287599a7a3..cc2323e243bb 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -178,9 +178,8 @@ static struct vm_area_struct *remove_vma(struct vm_area_struct *vma)
 	might_sleep();
 	if (vma->vm_ops && vma->vm_ops->close)
 		vma->vm_ops->close(vma);
-	if (vma->vm_file)
-		fput(vma->vm_file);
 	mpol_put(vma_policy(vma));
+	/* fput(vma->vm_file) happens in vm_area_free after an RCU delay. */
 	vm_area_free(vma);
 	return next;
 }
@@ -949,7 +948,8 @@ int __vma_adjust(struct vm_area_struct *vma, unsigned long start,
 	if (remove_next) {
 		if (file) {
 			uprobe_munmap(next, next->vm_start, next->vm_end);
-			fput(file);
+			/* fput(file) happens whthin vm_area_free(next) */
+			VM_BUG_ON(file != next->vm_file);
 		}
 		if (next->anon_vma)
 			anon_vma_merge(vma, next);
@@ -1828,7 +1828,7 @@ unsigned long mmap_region(struct file *file, unsigned long addr,
 				 * fput the vma->vm_file here or we would add an extra fput for file
 				 * and cause general protection fault ultimately.
 				 */
-				fput(vma->vm_file);
+				/* fput happens within vm_area_free */
 				vm_area_free(vma);
 				vma = merge;
 				/* Update vm_flags to pick up the change. */
@@ -1907,6 +1907,7 @@ unsigned long mmap_region(struct file *file, unsigned long addr,
 	if (vm_flags & VM_DENYWRITE)
 		allow_write_access(file);
 free_vma:
+	VM_BUG_ON(vma->vm_file);
 	vm_area_free(vma);
 unacct_error:
 	if (charged)
@@ -2779,6 +2780,7 @@ int __split_vma(struct mm_struct *mm, struct vm_area_struct *vma,
  out_free_mpol:
 	mpol_put(vma_policy(new));
  out_free_vma:
+	new->vm_file = NULL;	/* prevents fput within vm_area_free() */
 	vm_area_free(new);
 	return err;
 }
@@ -3343,6 +3345,7 @@ struct vm_area_struct *copy_vma(struct vm_area_struct **vmap,
 out_free_mempol:
 	mpol_put(vma_policy(new_vma));
 out_free_vma:
+	new_vma->vm_file = NULL;	/* Prevent fput within vm_area_free */
 	vm_area_free(new_vma);
 out:
 	return NULL;
diff --git a/mm/nommu.c b/mm/nommu.c
index 5c9ab799c0e6..06a0dc0b913b 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -664,9 +664,8 @@ static void delete_vma(struct mm_struct *mm, struct vm_area_struct *vma)
 {
 	if (vma->vm_ops && vma->vm_ops->close)
 		vma->vm_ops->close(vma);
-	if (vma->vm_file)
-		fput(vma->vm_file);
 	put_nommu_region(vma->vm_region);
+	/* fput(vma->vm_file) happens within vm_area_free() */
 	vm_area_free(vma);
 }
 
@@ -1267,8 +1266,7 @@ unsigned long do_mmap(struct file *file,
 	if (region->vm_file)
 		fput(region->vm_file);
 	kmem_cache_free(vm_region_jar, region);
-	if (vma->vm_file)
-		fput(vma->vm_file);
+	/* fput(vma->vm_file) happens within vm_area_free() */
 	vm_area_free(vma);
 	return ret;
 
-- 
2.20.1

[mm] 87b1c39af4: nvml.blk_rw_mt_TEST0_check_pmem_debug.fail

[kernel test robot]

[-- Attachment #1: Type: text/plain, Size: 2573 bytes --]



Greeting,

FYI, we noticed the following commit (built with gcc-9):

commit: 87b1c39af431a20ab69bdceb9036360cf58a28e4 ("[RFC PATCH 23/37] mm: rcu safe vma->vm_file freeing")
url: https://github.com/0day-ci/linux/commits/Michel-Lespinasse/Speculative-page-faults/20210407-095517
base: https://git.kernel.org/cgit/linux/kernel/git/tip/tip.git a500fc918f7b8dc3dff2e6c74f3e73e856c18248

in testcase: nvml
version: nvml-x86_64-09f75f696-1_20210402
with following parameters:

	test: pmem
	group: blk
	nr_pmem: 1
	fs: ext4
	mount_option: dax
	bp_memmap: 32G!4G
	ucode: 0x7000019



on test machine: 16 threads Intel(R) Xeon(R) CPU D-1541 @ 2.10GHz with 48G memory

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):




If you fix the issue, kindly add following tag
Reported-by: kernel test robot <oliver.sang@intel.com>


2021-04-07 16:01:30 ./RUNTESTS -f pmem blk_rw_mt
blk_rw_mt/TEST0: SETUP (check/pmem/debug)
[MATCHING FAILED, COMPLETE FILE (out0.log) BELOW]
blk_rw_mt/TEST0: START: blk_rw_mt
 ./blk_rw_mt 4096 /fs/pmem0//test_blk_rw_mt0😘⠏⠍⠙⠅ɗPMDKӜ⥺🙋/testfile1 123 5 80
4096 block size 4096 usable blocks 100
/fs/pmem0//test_blk_rw_mt0😘⠏⠍⠙⠅ɗPMDKӜ⥺🙋/testfile1: pmemblk_check: Resource temporarily unavailable
blk_rw_mt/TEST0: DONE

[EOF]
out0.log.match:1   blk_rw_mt$(nW)TEST0: START: blk_rw_mt
out0.log:1         blk_rw_mt/TEST0: START: blk_rw_mt
out0.log.match:2    $(nW)blk_rw_mt$(nW) 4096 $(nW)testfile1 123 5 80
out0.log:2          ./blk_rw_mt 4096 /fs/pmem0//test_blk_rw_mt0😘⠏⠍⠙⠅ɗPMDKӜ⥺🙋/testfile1 123 5 80
out0.log.match:3   4096 block size 4096 usable blocks 100
out0.log:3         4096 block size 4096 usable blocks 100
out0.log.match:4   blk_rw_mt$(nW)TEST0: DONE
out0.log:4         /fs/pmem0//test_blk_rw_mt0😘⠏⠍⠙⠅ɗPMDKӜ⥺🙋/testfile1: pmemblk_check: Resource temporarily unavailable
FAIL: match: out0.log.match:4 did not match pattern
RUNTESTS: stopping: blk_rw_mt/TEST0 failed, TEST=check FS=pmem BUILD=debug


To reproduce:

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        bin/lkp install                job.yaml  # job file is attached in this email
        bin/lkp split-job --compatible job.yaml
        bin/lkp run                    compatible-job.yaml



---
0DAY/LKP+ Test Infrastructure                   Open Source Technology Center
https://lists.01.org/hyperkitty/list/lkp@lists.01.org       Intel Corporation

Thanks,
Oliver Sang


[-- Attachment #2: config-5.12.0-rc2-00042-g87b1c39af431 --]
[-- Type: text/plain, Size: 172931 bytes --]

#
# Automatically generated file; DO NOT EDIT.
# Linux/x86_64 5.12.0-rc2 Kernel Configuration
#
CONFIG_CC_VERSION_TEXT="gcc-9 (Debian 9.3.0-22) 9.3.0"
CONFIG_CC_IS_GCC=y
CONFIG_GCC_VERSION=90300
CONFIG_CLANG_VERSION=0
CONFIG_LD_IS_BFD=y
CONFIG_LD_VERSION=23502
CONFIG_LLD_VERSION=0
CONFIG_CC_CAN_LINK=y
CONFIG_CC_CAN_LINK_STATIC=y
CONFIG_CC_HAS_ASM_GOTO=y
CONFIG_CC_HAS_ASM_INLINE=y
CONFIG_IRQ_WORK=y
CONFIG_BUILDTIME_TABLE_SORT=y
CONFIG_THREAD_INFO_IN_TASK=y

#
# General setup
#
CONFIG_INIT_ENV_ARG_LIMIT=32
# CONFIG_COMPILE_TEST is not set
CONFIG_LOCALVERSION=""
CONFIG_LOCALVERSION_AUTO=y
CONFIG_BUILD_SALT=""
CONFIG_HAVE_KERNEL_GZIP=y
CONFIG_HAVE_KERNEL_BZIP2=y
CONFIG_HAVE_KERNEL_LZMA=y
CONFIG_HAVE_KERNEL_XZ=y
CONFIG_HAVE_KERNEL_LZO=y
CONFIG_HAVE_KERNEL_LZ4=y
CONFIG_HAVE_KERNEL_ZSTD=y
CONFIG_KERNEL_GZIP=y
# CONFIG_KERNEL_BZIP2 is not set
# CONFIG_KERNEL_LZMA is not set
# CONFIG_KERNEL_XZ is not set
# CONFIG_KERNEL_LZO is not set
# CONFIG_KERNEL_LZ4 is not set
# CONFIG_KERNEL_ZSTD is not set
CONFIG_DEFAULT_INIT=""
CONFIG_DEFAULT_HOSTNAME="(none)"
CONFIG_SWAP=y
CONFIG_SYSVIPC=y
CONFIG_SYSVIPC_SYSCTL=y
CONFIG_POSIX_MQUEUE=y
CONFIG_POSIX_MQUEUE_SYSCTL=y
# CONFIG_WATCH_QUEUE is not set
CONFIG_CROSS_MEMORY_ATTACH=y
# CONFIG_USELIB is not set
CONFIG_AUDIT=y
CONFIG_HAVE_ARCH_AUDITSYSCALL=y
CONFIG_AUDITSYSCALL=y

#
# IRQ subsystem
#
CONFIG_GENERIC_IRQ_PROBE=y
CONFIG_GENERIC_IRQ_SHOW=y
CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASK=y
CONFIG_GENERIC_PENDING_IRQ=y
CONFIG_GENERIC_IRQ_MIGRATION=y
CONFIG_GENERIC_IRQ_INJECTION=y
CONFIG_HARDIRQS_SW_RESEND=y
CONFIG_IRQ_DOMAIN=y
CONFIG_IRQ_DOMAIN_HIERARCHY=y
CONFIG_GENERIC_MSI_IRQ=y
CONFIG_GENERIC_MSI_IRQ_DOMAIN=y
CONFIG_IRQ_MSI_IOMMU=y
CONFIG_GENERIC_IRQ_MATRIX_ALLOCATOR=y
CONFIG_GENERIC_IRQ_RESERVATION_MODE=y
CONFIG_IRQ_FORCED_THREADING=y
CONFIG_SPARSE_IRQ=y
# CONFIG_GENERIC_IRQ_DEBUGFS is not set
# end of IRQ subsystem

CONFIG_CLOCKSOURCE_WATCHDOG=y
CONFIG_ARCH_CLOCKSOURCE_INIT=y
CONFIG_CLOCKSOURCE_VALIDATE_LAST_CYCLE=y
CONFIG_GENERIC_TIME_VSYSCALL=y
CONFIG_GENERIC_CLOCKEVENTS=y
CONFIG_GENERIC_CLOCKEVENTS_BROADCAST=y
CONFIG_GENERIC_CLOCKEVENTS_MIN_ADJUST=y
CONFIG_GENERIC_CMOS_UPDATE=y
CONFIG_HAVE_POSIX_CPU_TIMERS_TASK_WORK=y
CONFIG_POSIX_CPU_TIMERS_TASK_WORK=y

#
# Timers subsystem
#
CONFIG_TICK_ONESHOT=y
CONFIG_NO_HZ_COMMON=y
# CONFIG_HZ_PERIODIC is not set
# CONFIG_NO_HZ_IDLE is not set
CONFIG_NO_HZ_FULL=y
CONFIG_CONTEXT_TRACKING=y
# CONFIG_CONTEXT_TRACKING_FORCE is not set
CONFIG_NO_HZ=y
CONFIG_HIGH_RES_TIMERS=y
# end of Timers subsystem

# CONFIG_PREEMPT_NONE is not set
CONFIG_PREEMPT_VOLUNTARY=y
# CONFIG_PREEMPT is not set
CONFIG_PREEMPT_COUNT=y

#
# CPU/Task time and stats accounting
#
CONFIG_VIRT_CPU_ACCOUNTING=y
CONFIG_VIRT_CPU_ACCOUNTING_GEN=y
CONFIG_IRQ_TIME_ACCOUNTING=y
CONFIG_HAVE_SCHED_AVG_IRQ=y
CONFIG_BSD_PROCESS_ACCT=y
CONFIG_BSD_PROCESS_ACCT_V3=y
CONFIG_TASKSTATS=y
CONFIG_TASK_DELAY_ACCT=y
CONFIG_TASK_XACCT=y
CONFIG_TASK_IO_ACCOUNTING=y
# CONFIG_PSI is not set
# end of CPU/Task time and stats accounting

CONFIG_CPU_ISOLATION=y

#
# RCU Subsystem
#
CONFIG_TREE_RCU=y
# CONFIG_RCU_EXPERT is not set
CONFIG_SRCU=y
CONFIG_TREE_SRCU=y
CONFIG_TASKS_RCU_GENERIC=y
CONFIG_TASKS_RCU=y
CONFIG_TASKS_RUDE_RCU=y
CONFIG_TASKS_TRACE_RCU=y
CONFIG_RCU_STALL_COMMON=y
CONFIG_RCU_NEED_SEGCBLIST=y
CONFIG_RCU_NOCB_CPU=y
# end of RCU Subsystem

CONFIG_BUILD_BIN2C=y
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
# CONFIG_IKHEADERS is not set
CONFIG_LOG_BUF_SHIFT=20
CONFIG_LOG_CPU_MAX_BUF_SHIFT=12
CONFIG_PRINTK_SAFE_LOG_BUF_SHIFT=13
CONFIG_HAVE_UNSTABLE_SCHED_CLOCK=y

#
# Scheduler features
#
# CONFIG_UCLAMP_TASK is not set
# end of Scheduler features

CONFIG_ARCH_SUPPORTS_NUMA_BALANCING=y
CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH=y
CONFIG_CC_HAS_INT128=y
CONFIG_ARCH_SUPPORTS_INT128=y
CONFIG_NUMA_BALANCING=y
CONFIG_NUMA_BALANCING_DEFAULT_ENABLED=y
CONFIG_CGROUPS=y
CONFIG_PAGE_COUNTER=y
CONFIG_MEMCG=y
CONFIG_MEMCG_SWAP=y
CONFIG_MEMCG_KMEM=y
CONFIG_BLK_CGROUP=y
CONFIG_CGROUP_WRITEBACK=y
CONFIG_CGROUP_SCHED=y
CONFIG_FAIR_GROUP_SCHED=y
CONFIG_CFS_BANDWIDTH=y
CONFIG_RT_GROUP_SCHED=y
CONFIG_CGROUP_PIDS=y
CONFIG_CGROUP_RDMA=y
CONFIG_CGROUP_FREEZER=y
CONFIG_CGROUP_HUGETLB=y
CONFIG_CPUSETS=y
CONFIG_PROC_PID_CPUSET=y
CONFIG_CGROUP_DEVICE=y
CONFIG_CGROUP_CPUACCT=y
CONFIG_CGROUP_PERF=y
CONFIG_CGROUP_BPF=y
# CONFIG_CGROUP_DEBUG is not set
CONFIG_SOCK_CGROUP_DATA=y
CONFIG_NAMESPACES=y
CONFIG_UTS_NS=y
CONFIG_TIME_NS=y
CONFIG_IPC_NS=y
CONFIG_USER_NS=y
CONFIG_PID_NS=y
CONFIG_NET_NS=y
# CONFIG_CHECKPOINT_RESTORE is not set
CONFIG_SCHED_AUTOGROUP=y
# CONFIG_SYSFS_DEPRECATED is not set
CONFIG_RELAY=y
CONFIG_BLK_DEV_INITRD=y
CONFIG_INITRAMFS_SOURCE=""
CONFIG_RD_GZIP=y
CONFIG_RD_BZIP2=y
CONFIG_RD_LZMA=y
CONFIG_RD_XZ=y
CONFIG_RD_LZO=y
CONFIG_RD_LZ4=y
CONFIG_RD_ZSTD=y
# CONFIG_BOOT_CONFIG is not set
CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE=y
# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
CONFIG_LD_ORPHAN_WARN=y
CONFIG_SYSCTL=y
CONFIG_HAVE_UID16=y
CONFIG_SYSCTL_EXCEPTION_TRACE=y
CONFIG_HAVE_PCSPKR_PLATFORM=y
CONFIG_BPF=y
# CONFIG_EXPERT is not set
CONFIG_UID16=y
CONFIG_MULTIUSER=y
CONFIG_SGETMASK_SYSCALL=y
CONFIG_SYSFS_SYSCALL=y
CONFIG_FHANDLE=y
CONFIG_POSIX_TIMERS=y
CONFIG_PRINTK=y
CONFIG_PRINTK_NMI=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
CONFIG_PCSPKR_PLATFORM=y
CONFIG_BASE_FULL=y
CONFIG_FUTEX=y
CONFIG_FUTEX_PI=y
CONFIG_EPOLL=y
CONFIG_SIGNALFD=y
CONFIG_TIMERFD=y
CONFIG_EVENTFD=y
CONFIG_SHMEM=y
CONFIG_AIO=y
CONFIG_IO_URING=y
CONFIG_ADVISE_SYSCALLS=y
CONFIG_HAVE_ARCH_USERFAULTFD_WP=y
CONFIG_MEMBARRIER=y
CONFIG_KALLSYMS=y
CONFIG_KALLSYMS_ALL=y
CONFIG_KALLSYMS_ABSOLUTE_PERCPU=y
CONFIG_KALLSYMS_BASE_RELATIVE=y
# CONFIG_BPF_LSM is not set
CONFIG_BPF_SYSCALL=y
CONFIG_ARCH_WANT_DEFAULT_BPF_JIT=y
CONFIG_BPF_JIT_ALWAYS_ON=y
CONFIG_BPF_JIT_DEFAULT_ON=y
# CONFIG_BPF_PRELOAD is not set
CONFIG_USERFAULTFD=y
CONFIG_ARCH_HAS_MEMBARRIER_SYNC_CORE=y
CONFIG_KCMP=y
CONFIG_RSEQ=y
# CONFIG_EMBEDDED is not set
CONFIG_HAVE_PERF_EVENTS=y

#
# Kernel Performance Events And Counters
#
CONFIG_PERF_EVENTS=y
# CONFIG_DEBUG_PERF_USE_VMALLOC is not set
# end of Kernel Performance Events And Counters

CONFIG_VM_EVENT_COUNTERS=y
CONFIG_SLUB_DEBUG=y
# CONFIG_COMPAT_BRK is not set
# CONFIG_SLAB is not set
CONFIG_SLUB=y
CONFIG_SLAB_MERGE_DEFAULT=y
CONFIG_SLAB_FREELIST_RANDOM=y
# CONFIG_SLAB_FREELIST_HARDENED is not set
CONFIG_SHUFFLE_PAGE_ALLOCATOR=y
CONFIG_SLUB_CPU_PARTIAL=y
CONFIG_SYSTEM_DATA_VERIFICATION=y
CONFIG_PROFILING=y
CONFIG_TRACEPOINTS=y
# end of General setup

CONFIG_64BIT=y
CONFIG_X86_64=y
CONFIG_X86=y
CONFIG_INSTRUCTION_DECODER=y
CONFIG_OUTPUT_FORMAT="elf64-x86-64"
CONFIG_LOCKDEP_SUPPORT=y
CONFIG_STACKTRACE_SUPPORT=y
CONFIG_MMU=y
CONFIG_ARCH_MMAP_RND_BITS_MIN=28
CONFIG_ARCH_MMAP_RND_BITS_MAX=32
CONFIG_ARCH_MMAP_RND_COMPAT_BITS_MIN=8
CONFIG_ARCH_MMAP_RND_COMPAT_BITS_MAX=16
CONFIG_GENERIC_ISA_DMA=y
CONFIG_GENERIC_BUG=y
CONFIG_GENERIC_BUG_RELATIVE_POINTERS=y
CONFIG_ARCH_MAY_HAVE_PC_FDC=y
CONFIG_GENERIC_CALIBRATE_DELAY=y
CONFIG_ARCH_HAS_CPU_RELAX=y
CONFIG_ARCH_HAS_CACHE_LINE_SIZE=y
CONFIG_ARCH_HAS_FILTER_PGPROT=y
CONFIG_HAVE_SETUP_PER_CPU_AREA=y
CONFIG_NEED_PER_CPU_EMBED_FIRST_CHUNK=y
CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK=y
CONFIG_ARCH_HIBERNATION_POSSIBLE=y
CONFIG_ARCH_SUSPEND_POSSIBLE=y
CONFIG_ARCH_WANT_GENERAL_HUGETLB=y
CONFIG_ZONE_DMA32=y
CONFIG_AUDIT_ARCH=y
CONFIG_HAVE_INTEL_TXT=y
CONFIG_X86_64_SMP=y
CONFIG_ARCH_SUPPORTS_UPROBES=y
CONFIG_FIX_EARLYCON_MEM=y
CONFIG_DYNAMIC_PHYSICAL_MASK=y
CONFIG_PGTABLE_LEVELS=5
CONFIG_CC_HAS_SANE_STACKPROTECTOR=y

#
# Processor type and features
#
CONFIG_ZONE_DMA=y
CONFIG_SMP=y
CONFIG_X86_FEATURE_NAMES=y
CONFIG_X86_X2APIC=y
CONFIG_X86_MPPARSE=y
# CONFIG_GOLDFISH is not set
CONFIG_RETPOLINE=y
CONFIG_X86_CPU_RESCTRL=y
CONFIG_X86_EXTENDED_PLATFORM=y
# CONFIG_X86_NUMACHIP is not set
# CONFIG_X86_VSMP is not set
CONFIG_X86_UV=y
# CONFIG_X86_GOLDFISH is not set
# CONFIG_X86_INTEL_MID is not set
CONFIG_X86_INTEL_LPSS=y
CONFIG_X86_AMD_PLATFORM_DEVICE=y
CONFIG_IOSF_MBI=y
# CONFIG_IOSF_MBI_DEBUG is not set
CONFIG_X86_SUPPORTS_MEMORY_FAILURE=y
# CONFIG_SCHED_OMIT_FRAME_POINTER is not set
CONFIG_HYPERVISOR_GUEST=y
CONFIG_PARAVIRT=y
# CONFIG_PARAVIRT_DEBUG is not set
CONFIG_PARAVIRT_SPINLOCKS=y
CONFIG_X86_HV_CALLBACK_VECTOR=y
CONFIG_XEN=y
# CONFIG_XEN_PV is not set
CONFIG_XEN_PVHVM=y
CONFIG_XEN_PVHVM_SMP=y
CONFIG_XEN_PVHVM_GUEST=y
CONFIG_XEN_SAVE_RESTORE=y
# CONFIG_XEN_DEBUG_FS is not set
# CONFIG_XEN_PVH is not set
CONFIG_KVM_GUEST=y
CONFIG_ARCH_CPUIDLE_HALTPOLL=y
# CONFIG_PVH is not set
CONFIG_PARAVIRT_TIME_ACCOUNTING=y
CONFIG_PARAVIRT_CLOCK=y
# CONFIG_JAILHOUSE_GUEST is not set
# CONFIG_ACRN_GUEST is not set
# CONFIG_MK8 is not set
# CONFIG_MPSC is not set
# CONFIG_MCORE2 is not set
# CONFIG_MATOM is not set
CONFIG_GENERIC_CPU=y
CONFIG_X86_INTERNODE_CACHE_SHIFT=6
CONFIG_X86_L1_CACHE_SHIFT=6
CONFIG_X86_TSC=y
CONFIG_X86_CMPXCHG64=y
CONFIG_X86_CMOV=y
CONFIG_X86_MINIMUM_CPU_FAMILY=64
CONFIG_X86_DEBUGCTLMSR=y
CONFIG_IA32_FEAT_CTL=y
CONFIG_X86_VMX_FEATURE_NAMES=y
CONFIG_CPU_SUP_INTEL=y
CONFIG_CPU_SUP_AMD=y
CONFIG_CPU_SUP_HYGON=y
CONFIG_CPU_SUP_CENTAUR=y
CONFIG_CPU_SUP_ZHAOXIN=y
CONFIG_HPET_TIMER=y
CONFIG_HPET_EMULATE_RTC=y
CONFIG_DMI=y
# CONFIG_GART_IOMMU is not set
CONFIG_MAXSMP=y
CONFIG_NR_CPUS_RANGE_BEGIN=8192
CONFIG_NR_CPUS_RANGE_END=8192
CONFIG_NR_CPUS_DEFAULT=8192
CONFIG_NR_CPUS=8192
CONFIG_SCHED_SMT=y
CONFIG_SCHED_MC=y
CONFIG_SCHED_MC_PRIO=y
CONFIG_X86_LOCAL_APIC=y
CONFIG_X86_IO_APIC=y
CONFIG_X86_REROUTE_FOR_BROKEN_BOOT_IRQS=y
CONFIG_X86_MCE=y
CONFIG_X86_MCELOG_LEGACY=y
CONFIG_X86_MCE_INTEL=y
CONFIG_X86_MCE_AMD=y
CONFIG_X86_MCE_THRESHOLD=y
CONFIG_X86_MCE_INJECT=m

#
# Performance monitoring
#
CONFIG_PERF_EVENTS_INTEL_UNCORE=m
CONFIG_PERF_EVENTS_INTEL_RAPL=m
CONFIG_PERF_EVENTS_INTEL_CSTATE=m
CONFIG_PERF_EVENTS_AMD_POWER=m
# end of Performance monitoring

CONFIG_X86_16BIT=y
CONFIG_X86_ESPFIX64=y
CONFIG_X86_VSYSCALL_EMULATION=y
CONFIG_X86_IOPL_IOPERM=y
CONFIG_I8K=m
CONFIG_MICROCODE=y
CONFIG_MICROCODE_INTEL=y
CONFIG_MICROCODE_AMD=y
CONFIG_MICROCODE_OLD_INTERFACE=y
CONFIG_X86_MSR=y
CONFIG_X86_CPUID=y
CONFIG_X86_5LEVEL=y
CONFIG_X86_DIRECT_GBPAGES=y
# CONFIG_X86_CPA_STATISTICS is not set
CONFIG_AMD_MEM_ENCRYPT=y
# CONFIG_AMD_MEM_ENCRYPT_ACTIVE_BY_DEFAULT is not set
CONFIG_NUMA=y
CONFIG_AMD_NUMA=y
CONFIG_X86_64_ACPI_NUMA=y
CONFIG_NUMA_EMU=y
CONFIG_NODES_SHIFT=10
CONFIG_ARCH_SPARSEMEM_ENABLE=y
CONFIG_ARCH_SPARSEMEM_DEFAULT=y
CONFIG_ARCH_SELECT_MEMORY_MODEL=y
# CONFIG_ARCH_MEMORY_PROBE is not set
CONFIG_ARCH_PROC_KCORE_TEXT=y
CONFIG_ILLEGAL_POINTER_VALUE=0xdead000000000000
CONFIG_X86_PMEM_LEGACY_DEVICE=y
CONFIG_X86_PMEM_LEGACY=m
CONFIG_X86_CHECK_BIOS_CORRUPTION=y
# CONFIG_X86_BOOTPARAM_MEMORY_CORRUPTION_CHECK is not set
CONFIG_X86_RESERVE_LOW=64
CONFIG_MTRR=y
CONFIG_MTRR_SANITIZER=y
CONFIG_MTRR_SANITIZER_ENABLE_DEFAULT=1
CONFIG_MTRR_SANITIZER_SPARE_REG_NR_DEFAULT=1
CONFIG_X86_PAT=y
CONFIG_ARCH_USES_PG_UNCACHED=y
CONFIG_ARCH_RANDOM=y
CONFIG_X86_SMAP=y
CONFIG_X86_UMIP=y
CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS=y
CONFIG_X86_INTEL_TSX_MODE_OFF=y
# CONFIG_X86_INTEL_TSX_MODE_ON is not set
# CONFIG_X86_INTEL_TSX_MODE_AUTO is not set
# CONFIG_X86_SGX is not set
CONFIG_EFI=y
CONFIG_EFI_STUB=y
CONFIG_EFI_MIXED=y
# CONFIG_HZ_100 is not set
# CONFIG_HZ_250 is not set
# CONFIG_HZ_300 is not set
CONFIG_HZ_1000=y
CONFIG_HZ=1000
CONFIG_SCHED_HRTICK=y
CONFIG_KEXEC=y
CONFIG_KEXEC_FILE=y
CONFIG_ARCH_HAS_KEXEC_PURGATORY=y
# CONFIG_KEXEC_SIG is not set
CONFIG_CRASH_DUMP=y
CONFIG_KEXEC_JUMP=y
CONFIG_PHYSICAL_START=0x1000000
CONFIG_RELOCATABLE=y
CONFIG_RANDOMIZE_BASE=y
CONFIG_X86_NEED_RELOCS=y
CONFIG_PHYSICAL_ALIGN=0x200000
CONFIG_DYNAMIC_MEMORY_LAYOUT=y
CONFIG_RANDOMIZE_MEMORY=y
CONFIG_RANDOMIZE_MEMORY_PHYSICAL_PADDING=0xa
CONFIG_HOTPLUG_CPU=y
CONFIG_BOOTPARAM_HOTPLUG_CPU0=y
# CONFIG_DEBUG_HOTPLUG_CPU0 is not set
# CONFIG_COMPAT_VDSO is not set
CONFIG_LEGACY_VSYSCALL_EMULATE=y
# CONFIG_LEGACY_VSYSCALL_XONLY is not set
# CONFIG_LEGACY_VSYSCALL_NONE is not set
# CONFIG_CMDLINE_BOOL is not set
CONFIG_MODIFY_LDT_SYSCALL=y
CONFIG_HAVE_LIVEPATCH=y
CONFIG_LIVEPATCH=y
# end of Processor type and features

CONFIG_ARCH_HAS_ADD_PAGES=y
CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y
CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE=y
CONFIG_USE_PERCPU_NUMA_NODE_ID=y
CONFIG_ARCH_ENABLE_SPLIT_PMD_PTLOCK=y
CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION=y
CONFIG_ARCH_ENABLE_THP_MIGRATION=y

#
# Power management and ACPI options
#
CONFIG_ARCH_HIBERNATION_HEADER=y
CONFIG_SUSPEND=y
CONFIG_SUSPEND_FREEZER=y
CONFIG_HIBERNATE_CALLBACKS=y
CONFIG_HIBERNATION=y
CONFIG_HIBERNATION_SNAPSHOT_DEV=y
CONFIG_PM_STD_PARTITION=""
CONFIG_PM_SLEEP=y
CONFIG_PM_SLEEP_SMP=y
# CONFIG_PM_AUTOSLEEP is not set
# CONFIG_PM_WAKELOCKS is not set
CONFIG_PM=y
CONFIG_PM_DEBUG=y
# CONFIG_PM_ADVANCED_DEBUG is not set
# CONFIG_PM_TEST_SUSPEND is not set
CONFIG_PM_SLEEP_DEBUG=y
# CONFIG_PM_TRACE_RTC is not set
CONFIG_PM_CLK=y
# CONFIG_WQ_POWER_EFFICIENT_DEFAULT is not set
# CONFIG_ENERGY_MODEL is not set
CONFIG_ARCH_SUPPORTS_ACPI=y
CONFIG_ACPI=y
CONFIG_ACPI_LEGACY_TABLES_LOOKUP=y
CONFIG_ARCH_MIGHT_HAVE_ACPI_PDC=y
CONFIG_ACPI_SYSTEM_POWER_STATES_SUPPORT=y
# CONFIG_ACPI_DEBUGGER is not set
CONFIG_ACPI_SPCR_TABLE=y
# CONFIG_ACPI_FPDT is not set
CONFIG_ACPI_LPIT=y
CONFIG_ACPI_SLEEP=y
CONFIG_ACPI_REV_OVERRIDE_POSSIBLE=y
CONFIG_ACPI_EC_DEBUGFS=m
CONFIG_ACPI_AC=y
CONFIG_ACPI_BATTERY=y
CONFIG_ACPI_BUTTON=y
CONFIG_ACPI_VIDEO=m
CONFIG_ACPI_FAN=y
CONFIG_ACPI_TAD=m
CONFIG_ACPI_DOCK=y
CONFIG_ACPI_CPU_FREQ_PSS=y
CONFIG_ACPI_PROCESSOR_CSTATE=y
CONFIG_ACPI_PROCESSOR_IDLE=y
CONFIG_ACPI_CPPC_LIB=y
CONFIG_ACPI_PROCESSOR=y
CONFIG_ACPI_IPMI=m
CONFIG_ACPI_HOTPLUG_CPU=y
CONFIG_ACPI_PROCESSOR_AGGREGATOR=m
CONFIG_ACPI_THERMAL=y
CONFIG_ACPI_PLATFORM_PROFILE=m
CONFIG_ARCH_HAS_ACPI_TABLE_UPGRADE=y
CONFIG_ACPI_TABLE_UPGRADE=y
# CONFIG_ACPI_DEBUG is not set
CONFIG_ACPI_PCI_SLOT=y
CONFIG_ACPI_CONTAINER=y
CONFIG_ACPI_HOTPLUG_MEMORY=y
CONFIG_ACPI_HOTPLUG_IOAPIC=y
CONFIG_ACPI_SBS=m
CONFIG_ACPI_HED=y
# CONFIG_ACPI_CUSTOM_METHOD is not set
CONFIG_ACPI_BGRT=y
CONFIG_ACPI_NFIT=m
# CONFIG_NFIT_SECURITY_DEBUG is not set
CONFIG_ACPI_NUMA=y
# CONFIG_ACPI_HMAT is not set
CONFIG_HAVE_ACPI_APEI=y
CONFIG_HAVE_ACPI_APEI_NMI=y
CONFIG_ACPI_APEI=y
CONFIG_ACPI_APEI_GHES=y
CONFIG_ACPI_APEI_PCIEAER=y
CONFIG_ACPI_APEI_MEMORY_FAILURE=y
CONFIG_ACPI_APEI_EINJ=m
CONFIG_ACPI_APEI_ERST_DEBUG=y
# CONFIG_ACPI_DPTF is not set
CONFIG_ACPI_WATCHDOG=y
CONFIG_ACPI_EXTLOG=m
CONFIG_ACPI_ADXL=y
# CONFIG_ACPI_CONFIGFS is not set
CONFIG_PMIC_OPREGION=y
CONFIG_X86_PM_TIMER=y

#
# CPU Frequency scaling
#
CONFIG_CPU_FREQ=y
CONFIG_CPU_FREQ_GOV_ATTR_SET=y
CONFIG_CPU_FREQ_GOV_COMMON=y
CONFIG_CPU_FREQ_STAT=y
CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE=y
# CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_SCHEDUTIL is not set
CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
CONFIG_CPU_FREQ_GOV_POWERSAVE=y
CONFIG_CPU_FREQ_GOV_USERSPACE=y
CONFIG_CPU_FREQ_GOV_ONDEMAND=y
CONFIG_CPU_FREQ_GOV_CONSERVATIVE=y
CONFIG_CPU_FREQ_GOV_SCHEDUTIL=y

#
# CPU frequency scaling drivers
#
CONFIG_X86_INTEL_PSTATE=y
# CONFIG_X86_PCC_CPUFREQ is not set
CONFIG_X86_ACPI_CPUFREQ=m
CONFIG_X86_ACPI_CPUFREQ_CPB=y
CONFIG_X86_POWERNOW_K8=m
CONFIG_X86_AMD_FREQ_SENSITIVITY=m
# CONFIG_X86_SPEEDSTEP_CENTRINO is not set
CONFIG_X86_P4_CLOCKMOD=m

#
# shared options
#
CONFIG_X86_SPEEDSTEP_LIB=m
# end of CPU Frequency scaling

#
# CPU Idle
#
CONFIG_CPU_IDLE=y
# CONFIG_CPU_IDLE_GOV_LADDER is not set
CONFIG_CPU_IDLE_GOV_MENU=y
# CONFIG_CPU_IDLE_GOV_TEO is not set
# CONFIG_CPU_IDLE_GOV_HALTPOLL is not set
CONFIG_HALTPOLL_CPUIDLE=y
# end of CPU Idle

CONFIG_INTEL_IDLE=y
# end of Power management and ACPI options

#
# Bus options (PCI etc.)
#
CONFIG_PCI_DIRECT=y
CONFIG_PCI_MMCONFIG=y
CONFIG_PCI_XEN=y
CONFIG_MMCONF_FAM10H=y
CONFIG_ISA_DMA_API=y
CONFIG_AMD_NB=y
# CONFIG_X86_SYSFB is not set
# end of Bus options (PCI etc.)

#
# Binary Emulations
#
CONFIG_IA32_EMULATION=y
# CONFIG_X86_X32 is not set
CONFIG_COMPAT_32=y
CONFIG_COMPAT=y
CONFIG_COMPAT_FOR_U64_ALIGNMENT=y
CONFIG_SYSVIPC_COMPAT=y
# end of Binary Emulations

#
# Firmware Drivers
#
CONFIG_EDD=m
# CONFIG_EDD_OFF is not set
CONFIG_FIRMWARE_MEMMAP=y
CONFIG_DMIID=y
CONFIG_DMI_SYSFS=y
CONFIG_DMI_SCAN_MACHINE_NON_EFI_FALLBACK=y
# CONFIG_ISCSI_IBFT is not set
CONFIG_FW_CFG_SYSFS=y
# CONFIG_FW_CFG_SYSFS_CMDLINE is not set
# CONFIG_GOOGLE_FIRMWARE is not set

#
# EFI (Extensible Firmware Interface) Support
#
CONFIG_EFI_VARS=y
CONFIG_EFI_ESRT=y
CONFIG_EFI_VARS_PSTORE=y
CONFIG_EFI_VARS_PSTORE_DEFAULT_DISABLE=y
CONFIG_EFI_RUNTIME_MAP=y
# CONFIG_EFI_FAKE_MEMMAP is not set
CONFIG_EFI_RUNTIME_WRAPPERS=y
CONFIG_EFI_GENERIC_STUB_INITRD_CMDLINE_LOADER=y
# CONFIG_EFI_BOOTLOADER_CONTROL is not set
# CONFIG_EFI_CAPSULE_LOADER is not set
# CONFIG_EFI_TEST is not set
CONFIG_APPLE_PROPERTIES=y
# CONFIG_RESET_ATTACK_MITIGATION is not set
# CONFIG_EFI_RCI2_TABLE is not set
# CONFIG_EFI_DISABLE_PCI_DMA is not set
# end of EFI (Extensible Firmware Interface) Support

CONFIG_UEFI_CPER=y
CONFIG_UEFI_CPER_X86=y
CONFIG_EFI_DEV_PATH_PARSER=y
CONFIG_EFI_EARLYCON=y
CONFIG_EFI_CUSTOM_SSDT_OVERLAYS=y

#
# Tegra firmware driver
#
# end of Tegra firmware driver
# end of Firmware Drivers

CONFIG_HAVE_KVM=y
CONFIG_HAVE_KVM_IRQCHIP=y
CONFIG_HAVE_KVM_IRQFD=y
CONFIG_HAVE_KVM_IRQ_ROUTING=y
CONFIG_HAVE_KVM_EVENTFD=y
CONFIG_KVM_MMIO=y
CONFIG_KVM_ASYNC_PF=y
CONFIG_HAVE_KVM_MSI=y
CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT=y
CONFIG_KVM_VFIO=y
CONFIG_KVM_GENERIC_DIRTYLOG_READ_PROTECT=y
CONFIG_KVM_COMPAT=y
CONFIG_HAVE_KVM_IRQ_BYPASS=y
CONFIG_HAVE_KVM_NO_POLL=y
CONFIG_KVM_XFER_TO_GUEST_WORK=y
CONFIG_VIRTUALIZATION=y
CONFIG_KVM=m
CONFIG_KVM_INTEL=m
# CONFIG_KVM_AMD is not set
# CONFIG_KVM_XEN is not set
CONFIG_KVM_MMU_AUDIT=y
CONFIG_AS_AVX512=y
CONFIG_AS_SHA1_NI=y
CONFIG_AS_SHA256_NI=y
CONFIG_AS_TPAUSE=y

#
# General architecture-dependent options
#
CONFIG_CRASH_CORE=y
CONFIG_KEXEC_CORE=y
CONFIG_HOTPLUG_SMT=y
CONFIG_GENERIC_ENTRY=y
CONFIG_KPROBES=y
CONFIG_JUMP_LABEL=y
# CONFIG_STATIC_KEYS_SELFTEST is not set
# CONFIG_STATIC_CALL_SELFTEST is not set
CONFIG_OPTPROBES=y
CONFIG_KPROBES_ON_FTRACE=y
CONFIG_UPROBES=y
CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS=y
CONFIG_ARCH_USE_BUILTIN_BSWAP=y
CONFIG_KRETPROBES=y
CONFIG_USER_RETURN_NOTIFIER=y
CONFIG_HAVE_IOREMAP_PROT=y
CONFIG_HAVE_KPROBES=y
CONFIG_HAVE_KRETPROBES=y
CONFIG_HAVE_OPTPROBES=y
CONFIG_HAVE_KPROBES_ON_FTRACE=y
CONFIG_HAVE_FUNCTION_ERROR_INJECTION=y
CONFIG_HAVE_NMI=y
CONFIG_HAVE_ARCH_TRACEHOOK=y
CONFIG_HAVE_DMA_CONTIGUOUS=y
CONFIG_GENERIC_SMP_IDLE_THREAD=y
CONFIG_ARCH_HAS_FORTIFY_SOURCE=y
CONFIG_ARCH_HAS_SET_MEMORY=y
CONFIG_ARCH_HAS_SET_DIRECT_MAP=y
CONFIG_HAVE_ARCH_THREAD_STRUCT_WHITELIST=y
CONFIG_ARCH_WANTS_DYNAMIC_TASK_STRUCT=y
CONFIG_HAVE_ASM_MODVERSIONS=y
CONFIG_HAVE_REGS_AND_STACK_ACCESS_API=y
CONFIG_HAVE_RSEQ=y
CONFIG_HAVE_FUNCTION_ARG_ACCESS_API=y
CONFIG_HAVE_HW_BREAKPOINT=y
CONFIG_HAVE_MIXED_BREAKPOINTS_REGS=y
CONFIG_HAVE_USER_RETURN_NOTIFIER=y
CONFIG_HAVE_PERF_EVENTS_NMI=y
CONFIG_HAVE_HARDLOCKUP_DETECTOR_PERF=y
CONFIG_HAVE_PERF_REGS=y
CONFIG_HAVE_PERF_USER_STACK_DUMP=y
CONFIG_HAVE_ARCH_JUMP_LABEL=y
CONFIG_HAVE_ARCH_JUMP_LABEL_RELATIVE=y
CONFIG_MMU_GATHER_TABLE_FREE=y
CONFIG_MMU_GATHER_RCU_TABLE_FREE=y
CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG=y
CONFIG_HAVE_ALIGNED_STRUCT_PAGE=y
CONFIG_HAVE_CMPXCHG_LOCAL=y
CONFIG_HAVE_CMPXCHG_DOUBLE=y
CONFIG_ARCH_WANT_COMPAT_IPC_PARSE_VERSION=y
CONFIG_ARCH_WANT_OLD_COMPAT_IPC=y
CONFIG_HAVE_ARCH_SECCOMP=y
CONFIG_HAVE_ARCH_SECCOMP_FILTER=y
CONFIG_SECCOMP=y
CONFIG_SECCOMP_FILTER=y
# CONFIG_SECCOMP_CACHE_DEBUG is not set
CONFIG_HAVE_ARCH_STACKLEAK=y
CONFIG_HAVE_STACKPROTECTOR=y
CONFIG_STACKPROTECTOR=y
CONFIG_STACKPROTECTOR_STRONG=y
CONFIG_ARCH_SUPPORTS_LTO_CLANG=y
CONFIG_ARCH_SUPPORTS_LTO_CLANG_THIN=y
CONFIG_LTO_NONE=y
CONFIG_HAVE_ARCH_WITHIN_STACK_FRAMES=y
CONFIG_HAVE_CONTEXT_TRACKING=y
CONFIG_HAVE_CONTEXT_TRACKING_OFFSTACK=y
CONFIG_HAVE_VIRT_CPU_ACCOUNTING_GEN=y
CONFIG_HAVE_IRQ_TIME_ACCOUNTING=y
CONFIG_HAVE_MOVE_PUD=y
CONFIG_HAVE_MOVE_PMD=y
CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE=y
CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD=y
CONFIG_HAVE_ARCH_HUGE_VMAP=y
CONFIG_ARCH_WANT_HUGE_PMD_SHARE=y
CONFIG_HAVE_ARCH_SOFT_DIRTY=y
CONFIG_HAVE_MOD_ARCH_SPECIFIC=y
CONFIG_MODULES_USE_ELF_RELA=y
CONFIG_HAVE_IRQ_EXIT_ON_IRQ_STACK=y
CONFIG_HAVE_SOFTIRQ_ON_OWN_STACK=y
CONFIG_ARCH_HAS_ELF_RANDOMIZE=y
CONFIG_HAVE_ARCH_MMAP_RND_BITS=y
CONFIG_HAVE_EXIT_THREAD=y
CONFIG_ARCH_MMAP_RND_BITS=28
CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS=y
CONFIG_ARCH_MMAP_RND_COMPAT_BITS=8
CONFIG_HAVE_ARCH_COMPAT_MMAP_BASES=y
CONFIG_HAVE_STACK_VALIDATION=y
CONFIG_HAVE_RELIABLE_STACKTRACE=y
CONFIG_OLD_SIGSUSPEND3=y
CONFIG_COMPAT_OLD_SIGACTION=y
CONFIG_COMPAT_32BIT_TIME=y
CONFIG_HAVE_ARCH_VMAP_STACK=y
CONFIG_VMAP_STACK=y
CONFIG_ARCH_HAS_STRICT_KERNEL_RWX=y
CONFIG_STRICT_KERNEL_RWX=y
CONFIG_ARCH_HAS_STRICT_MODULE_RWX=y
CONFIG_STRICT_MODULE_RWX=y
CONFIG_HAVE_ARCH_PREL32_RELOCATIONS=y
CONFIG_ARCH_USE_MEMREMAP_PROT=y
# CONFIG_LOCK_EVENT_COUNTS is not set
CONFIG_ARCH_HAS_MEM_ENCRYPT=y
CONFIG_HAVE_STATIC_CALL=y
CONFIG_HAVE_STATIC_CALL_INLINE=y
CONFIG_HAVE_PREEMPT_DYNAMIC=y
CONFIG_ARCH_WANT_LD_ORPHAN_WARN=y
CONFIG_ARCH_SUPPORTS_DEBUG_PAGEALLOC=y
CONFIG_ARCH_HAS_ELFCORE_COMPAT=y

#
# GCOV-based kernel profiling
#
# CONFIG_GCOV_KERNEL is not set
CONFIG_ARCH_HAS_GCOV_PROFILE_ALL=y
# end of GCOV-based kernel profiling

CONFIG_HAVE_GCC_PLUGINS=y
# end of General architecture-dependent options

CONFIG_RT_MUTEXES=y
CONFIG_BASE_SMALL=0
CONFIG_MODULE_SIG_FORMAT=y
CONFIG_MODULES=y
CONFIG_MODULE_FORCE_LOAD=y
CONFIG_MODULE_UNLOAD=y
# CONFIG_MODULE_FORCE_UNLOAD is not set
# CONFIG_MODVERSIONS is not set
# CONFIG_MODULE_SRCVERSION_ALL is not set
CONFIG_MODULE_SIG=y
# CONFIG_MODULE_SIG_FORCE is not set
CONFIG_MODULE_SIG_ALL=y
# CONFIG_MODULE_SIG_SHA1 is not set
# CONFIG_MODULE_SIG_SHA224 is not set
CONFIG_MODULE_SIG_SHA256=y
# CONFIG_MODULE_SIG_SHA384 is not set
# CONFIG_MODULE_SIG_SHA512 is not set
CONFIG_MODULE_SIG_HASH="sha256"
# CONFIG_MODULE_COMPRESS is not set
# CONFIG_MODULE_ALLOW_MISSING_NAMESPACE_IMPORTS is not set
CONFIG_MODULES_TREE_LOOKUP=y
CONFIG_BLOCK=y
CONFIG_BLK_SCSI_REQUEST=y
CONFIG_BLK_CGROUP_RWSTAT=y
CONFIG_BLK_DEV_BSG=y
CONFIG_BLK_DEV_BSGLIB=y
CONFIG_BLK_DEV_INTEGRITY=y
CONFIG_BLK_DEV_INTEGRITY_T10=m
CONFIG_BLK_DEV_ZONED=y
CONFIG_BLK_DEV_THROTTLING=y
# CONFIG_BLK_DEV_THROTTLING_LOW is not set
# CONFIG_BLK_CMDLINE_PARSER is not set
CONFIG_BLK_WBT=y
# CONFIG_BLK_CGROUP_IOLATENCY is not set
# CONFIG_BLK_CGROUP_IOCOST is not set
CONFIG_BLK_WBT_MQ=y
CONFIG_BLK_DEBUG_FS=y
CONFIG_BLK_DEBUG_FS_ZONED=y
# CONFIG_BLK_SED_OPAL is not set
# CONFIG_BLK_INLINE_ENCRYPTION is not set

#
# Partition Types
#
CONFIG_PARTITION_ADVANCED=y
# CONFIG_ACORN_PARTITION is not set
# CONFIG_AIX_PARTITION is not set
CONFIG_OSF_PARTITION=y
CONFIG_AMIGA_PARTITION=y
# CONFIG_ATARI_PARTITION is not set
CONFIG_MAC_PARTITION=y
CONFIG_MSDOS_PARTITION=y
CONFIG_BSD_DISKLABEL=y
CONFIG_MINIX_SUBPARTITION=y
CONFIG_SOLARIS_X86_PARTITION=y
CONFIG_UNIXWARE_DISKLABEL=y
# CONFIG_LDM_PARTITION is not set
CONFIG_SGI_PARTITION=y
# CONFIG_ULTRIX_PARTITION is not set
CONFIG_SUN_PARTITION=y
CONFIG_KARMA_PARTITION=y
CONFIG_EFI_PARTITION=y
# CONFIG_SYSV68_PARTITION is not set
# CONFIG_CMDLINE_PARTITION is not set
# end of Partition Types

CONFIG_BLOCK_COMPAT=y
CONFIG_BLK_MQ_PCI=y
CONFIG_BLK_MQ_VIRTIO=y
CONFIG_BLK_MQ_RDMA=y
CONFIG_BLK_PM=y

#
# IO Schedulers
#
CONFIG_MQ_IOSCHED_DEADLINE=y
CONFIG_MQ_IOSCHED_KYBER=y
CONFIG_IOSCHED_BFQ=y
CONFIG_BFQ_GROUP_IOSCHED=y
# CONFIG_BFQ_CGROUP_DEBUG is not set
# end of IO Schedulers

CONFIG_PREEMPT_NOTIFIERS=y
CONFIG_PADATA=y
CONFIG_ASN1=y
CONFIG_INLINE_SPIN_UNLOCK_IRQ=y
CONFIG_INLINE_READ_UNLOCK=y
CONFIG_INLINE_READ_UNLOCK_IRQ=y
CONFIG_INLINE_WRITE_UNLOCK=y
CONFIG_INLINE_WRITE_UNLOCK_IRQ=y
CONFIG_ARCH_SUPPORTS_ATOMIC_RMW=y
CONFIG_MUTEX_SPIN_ON_OWNER=y
CONFIG_RWSEM_SPIN_ON_OWNER=y
CONFIG_LOCK_SPIN_ON_OWNER=y
CONFIG_ARCH_USE_QUEUED_SPINLOCKS=y
CONFIG_QUEUED_SPINLOCKS=y
CONFIG_ARCH_USE_QUEUED_RWLOCKS=y
CONFIG_QUEUED_RWLOCKS=y
CONFIG_ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE=y
CONFIG_ARCH_HAS_SYNC_CORE_BEFORE_USERMODE=y
CONFIG_ARCH_HAS_SYSCALL_WRAPPER=y
CONFIG_FREEZER=y

#
# Executable file formats
#
CONFIG_BINFMT_ELF=y
CONFIG_COMPAT_BINFMT_ELF=y
CONFIG_ELFCORE=y
CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS=y
CONFIG_BINFMT_SCRIPT=y
CONFIG_BINFMT_MISC=m
CONFIG_COREDUMP=y
# end of Executable file formats

#
# Memory Management options
#
CONFIG_SELECT_MEMORY_MODEL=y
CONFIG_SPARSEMEM_MANUAL=y
CONFIG_SPARSEMEM=y
CONFIG_NEED_MULTIPLE_NODES=y
CONFIG_SPARSEMEM_EXTREME=y
CONFIG_SPARSEMEM_VMEMMAP_ENABLE=y
CONFIG_SPARSEMEM_VMEMMAP=y
CONFIG_HAVE_FAST_GUP=y
CONFIG_NUMA_KEEP_MEMINFO=y
CONFIG_MEMORY_ISOLATION=y
CONFIG_HAVE_BOOTMEM_INFO_NODE=y
CONFIG_MEMORY_HOTPLUG=y
CONFIG_MEMORY_HOTPLUG_SPARSE=y
# CONFIG_MEMORY_HOTPLUG_DEFAULT_ONLINE is not set
CONFIG_MEMORY_HOTREMOVE=y
CONFIG_SPLIT_PTLOCK_CPUS=4
CONFIG_MEMORY_BALLOON=y
CONFIG_BALLOON_COMPACTION=y
CONFIG_COMPACTION=y
CONFIG_PAGE_REPORTING=y
CONFIG_MIGRATION=y
CONFIG_CONTIG_ALLOC=y
CONFIG_PHYS_ADDR_T_64BIT=y
CONFIG_BOUNCE=y
CONFIG_VIRT_TO_BUS=y
CONFIG_MMU_NOTIFIER=y
CONFIG_KSM=y
CONFIG_DEFAULT_MMAP_MIN_ADDR=4096
CONFIG_ARCH_SUPPORTS_MEMORY_FAILURE=y
CONFIG_MEMORY_FAILURE=y
CONFIG_HWPOISON_INJECT=m
CONFIG_TRANSPARENT_HUGEPAGE=y
CONFIG_TRANSPARENT_HUGEPAGE_ALWAYS=y
# CONFIG_TRANSPARENT_HUGEPAGE_MADVISE is not set
CONFIG_ARCH_WANTS_THP_SWAP=y
CONFIG_THP_SWAP=y
CONFIG_CLEANCACHE=y
CONFIG_FRONTSWAP=y
CONFIG_CMA=y
# CONFIG_CMA_DEBUG is not set
# CONFIG_CMA_DEBUGFS is not set
CONFIG_CMA_AREAS=19
CONFIG_ZSWAP=y
# CONFIG_ZSWAP_COMPRESSOR_DEFAULT_DEFLATE is not set
CONFIG_ZSWAP_COMPRESSOR_DEFAULT_LZO=y
# CONFIG_ZSWAP_COMPRESSOR_DEFAULT_842 is not set
# CONFIG_ZSWAP_COMPRESSOR_DEFAULT_LZ4 is not set
# CONFIG_ZSWAP_COMPRESSOR_DEFAULT_LZ4HC is not set
# CONFIG_ZSWAP_COMPRESSOR_DEFAULT_ZSTD is not set
CONFIG_ZSWAP_COMPRESSOR_DEFAULT="lzo"
CONFIG_ZSWAP_ZPOOL_DEFAULT_ZBUD=y
# CONFIG_ZSWAP_ZPOOL_DEFAULT_Z3FOLD is not set
# CONFIG_ZSWAP_ZPOOL_DEFAULT_ZSMALLOC is not set
CONFIG_ZSWAP_ZPOOL_DEFAULT="zbud"
# CONFIG_ZSWAP_DEFAULT_ON is not set
CONFIG_ZPOOL=y
CONFIG_ZBUD=y
# CONFIG_Z3FOLD is not set
CONFIG_ZSMALLOC=y
CONFIG_ZSMALLOC_STAT=y
CONFIG_GENERIC_EARLY_IOREMAP=y
CONFIG_DEFERRED_STRUCT_PAGE_INIT=y
CONFIG_IDLE_PAGE_TRACKING=y
CONFIG_ARCH_HAS_PTE_DEVMAP=y
CONFIG_ZONE_DEVICE=y
CONFIG_DEV_PAGEMAP_OPS=y
CONFIG_HMM_MIRROR=y
CONFIG_DEVICE_PRIVATE=y
CONFIG_VMAP_PFN=y
CONFIG_ARCH_USES_HIGH_VMA_FLAGS=y
CONFIG_ARCH_HAS_PKEYS=y
# CONFIG_PERCPU_STATS is not set
# CONFIG_GUP_TEST is not set
# CONFIG_READ_ONLY_THP_FOR_FS is not set
CONFIG_ARCH_HAS_PTE_SPECIAL=y
CONFIG_ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT=y
CONFIG_SPECULATIVE_PAGE_FAULT=y
# end of Memory Management options

CONFIG_NET=y
CONFIG_COMPAT_NETLINK_MESSAGES=y
CONFIG_NET_INGRESS=y
CONFIG_NET_EGRESS=y
CONFIG_SKB_EXTENSIONS=y

#
# Networking options
#
CONFIG_PACKET=y
CONFIG_PACKET_DIAG=m
CONFIG_UNIX=y
CONFIG_UNIX_SCM=y
CONFIG_UNIX_DIAG=m
CONFIG_TLS=m
CONFIG_TLS_DEVICE=y
# CONFIG_TLS_TOE is not set
CONFIG_XFRM=y
CONFIG_XFRM_OFFLOAD=y
CONFIG_XFRM_ALGO=y
CONFIG_XFRM_USER=y
# CONFIG_XFRM_USER_COMPAT is not set
# CONFIG_XFRM_INTERFACE is not set
CONFIG_XFRM_SUB_POLICY=y
CONFIG_XFRM_MIGRATE=y
CONFIG_XFRM_STATISTICS=y
CONFIG_XFRM_AH=m
CONFIG_XFRM_ESP=m
CONFIG_XFRM_IPCOMP=m
CONFIG_NET_KEY=m
CONFIG_NET_KEY_MIGRATE=y
# CONFIG_SMC is not set
CONFIG_XDP_SOCKETS=y
# CONFIG_XDP_SOCKETS_DIAG is not set
CONFIG_INET=y
CONFIG_IP_MULTICAST=y
CONFIG_IP_ADVANCED_ROUTER=y
CONFIG_IP_FIB_TRIE_STATS=y
CONFIG_IP_MULTIPLE_TABLES=y
CONFIG_IP_ROUTE_MULTIPATH=y
CONFIG_IP_ROUTE_VERBOSE=y
CONFIG_IP_ROUTE_CLASSID=y
CONFIG_IP_PNP=y
CONFIG_IP_PNP_DHCP=y
# CONFIG_IP_PNP_BOOTP is not set
# CONFIG_IP_PNP_RARP is not set
CONFIG_NET_IPIP=m
CONFIG_NET_IPGRE_DEMUX=m
CONFIG_NET_IP_TUNNEL=m
CONFIG_NET_IPGRE=m
CONFIG_NET_IPGRE_BROADCAST=y
CONFIG_IP_MROUTE_COMMON=y
CONFIG_IP_MROUTE=y
CONFIG_IP_MROUTE_MULTIPLE_TABLES=y
CONFIG_IP_PIMSM_V1=y
CONFIG_IP_PIMSM_V2=y
CONFIG_SYN_COOKIES=y
CONFIG_NET_IPVTI=m
CONFIG_NET_UDP_TUNNEL=m
# CONFIG_NET_FOU is not set
# CONFIG_NET_FOU_IP_TUNNELS is not set
CONFIG_INET_AH=m
CONFIG_INET_ESP=m
CONFIG_INET_ESP_OFFLOAD=m
# CONFIG_INET_ESPINTCP is not set
CONFIG_INET_IPCOMP=m
CONFIG_INET_XFRM_TUNNEL=m
CONFIG_INET_TUNNEL=m
CONFIG_INET_DIAG=m
CONFIG_INET_TCP_DIAG=m
CONFIG_INET_UDP_DIAG=m
CONFIG_INET_RAW_DIAG=m
# CONFIG_INET_DIAG_DESTROY is not set
CONFIG_TCP_CONG_ADVANCED=y
CONFIG_TCP_CONG_BIC=m
CONFIG_TCP_CONG_CUBIC=y
CONFIG_TCP_CONG_WESTWOOD=m
CONFIG_TCP_CONG_HTCP=m
CONFIG_TCP_CONG_HSTCP=m
CONFIG_TCP_CONG_HYBLA=m
CONFIG_TCP_CONG_VEGAS=m
CONFIG_TCP_CONG_NV=m
CONFIG_TCP_CONG_SCALABLE=m
CONFIG_TCP_CONG_LP=m
CONFIG_TCP_CONG_VENO=m
CONFIG_TCP_CONG_YEAH=m
CONFIG_TCP_CONG_ILLINOIS=m
CONFIG_TCP_CONG_DCTCP=m
# CONFIG_TCP_CONG_CDG is not set
CONFIG_TCP_CONG_BBR=m
CONFIG_DEFAULT_CUBIC=y
# CONFIG_DEFAULT_RENO is not set
CONFIG_DEFAULT_TCP_CONG="cubic"
CONFIG_TCP_MD5SIG=y
CONFIG_IPV6=y
CONFIG_IPV6_ROUTER_PREF=y
CONFIG_IPV6_ROUTE_INFO=y
CONFIG_IPV6_OPTIMISTIC_DAD=y
CONFIG_INET6_AH=m
CONFIG_INET6_ESP=m
CONFIG_INET6_ESP_OFFLOAD=m
# CONFIG_INET6_ESPINTCP is not set
CONFIG_INET6_IPCOMP=m
CONFIG_IPV6_MIP6=m
# CONFIG_IPV6_ILA is not set
CONFIG_INET6_XFRM_TUNNEL=m
CONFIG_INET6_TUNNEL=m
CONFIG_IPV6_VTI=m
CONFIG_IPV6_SIT=m
CONFIG_IPV6_SIT_6RD=y
CONFIG_IPV6_NDISC_NODETYPE=y
CONFIG_IPV6_TUNNEL=m
CONFIG_IPV6_GRE=m
CONFIG_IPV6_MULTIPLE_TABLES=y
# CONFIG_IPV6_SUBTREES is not set
CONFIG_IPV6_MROUTE=y
CONFIG_IPV6_MROUTE_MULTIPLE_TABLES=y
CONFIG_IPV6_PIMSM_V2=y
# CONFIG_IPV6_SEG6_LWTUNNEL is not set
# CONFIG_IPV6_SEG6_HMAC is not set
# CONFIG_IPV6_RPL_LWTUNNEL is not set
CONFIG_NETLABEL=y
# CONFIG_MPTCP is not set
CONFIG_NETWORK_SECMARK=y
CONFIG_NET_PTP_CLASSIFY=y
CONFIG_NETWORK_PHY_TIMESTAMPING=y
CONFIG_NETFILTER=y
CONFIG_NETFILTER_ADVANCED=y
CONFIG_BRIDGE_NETFILTER=m

#
# Core Netfilter Configuration
#
CONFIG_NETFILTER_INGRESS=y
CONFIG_NETFILTER_NETLINK=m
CONFIG_NETFILTER_FAMILY_BRIDGE=y
CONFIG_NETFILTER_FAMILY_ARP=y
# CONFIG_NETFILTER_NETLINK_ACCT is not set
CONFIG_NETFILTER_NETLINK_QUEUE=m
CONFIG_NETFILTER_NETLINK_LOG=m
CONFIG_NETFILTER_NETLINK_OSF=m
CONFIG_NF_CONNTRACK=m
CONFIG_NF_LOG_COMMON=m
CONFIG_NF_LOG_NETDEV=m
CONFIG_NETFILTER_CONNCOUNT=m
CONFIG_NF_CONNTRACK_MARK=y
CONFIG_NF_CONNTRACK_SECMARK=y
CONFIG_NF_CONNTRACK_ZONES=y
CONFIG_NF_CONNTRACK_PROCFS=y
CONFIG_NF_CONNTRACK_EVENTS=y
CONFIG_NF_CONNTRACK_TIMEOUT=y
CONFIG_NF_CONNTRACK_TIMESTAMP=y
CONFIG_NF_CONNTRACK_LABELS=y
CONFIG_NF_CT_PROTO_DCCP=y
CONFIG_NF_CT_PROTO_GRE=y
CONFIG_NF_CT_PROTO_SCTP=y
CONFIG_NF_CT_PROTO_UDPLITE=y
CONFIG_NF_CONNTRACK_AMANDA=m
CONFIG_NF_CONNTRACK_FTP=m
CONFIG_NF_CONNTRACK_H323=m
CONFIG_NF_CONNTRACK_IRC=m
CONFIG_NF_CONNTRACK_BROADCAST=m
CONFIG_NF_CONNTRACK_NETBIOS_NS=m
CONFIG_NF_CONNTRACK_SNMP=m
CONFIG_NF_CONNTRACK_PPTP=m
CONFIG_NF_CONNTRACK_SANE=m
CONFIG_NF_CONNTRACK_SIP=m
CONFIG_NF_CONNTRACK_TFTP=m
CONFIG_NF_CT_NETLINK=m
CONFIG_NF_CT_NETLINK_TIMEOUT=m
CONFIG_NF_CT_NETLINK_HELPER=m
CONFIG_NETFILTER_NETLINK_GLUE_CT=y
CONFIG_NF_NAT=m
CONFIG_NF_NAT_AMANDA=m
CONFIG_NF_NAT_FTP=m
CONFIG_NF_NAT_IRC=m
CONFIG_NF_NAT_SIP=m
CONFIG_NF_NAT_TFTP=m
CONFIG_NF_NAT_REDIRECT=y
CONFIG_NF_NAT_MASQUERADE=y
CONFIG_NETFILTER_SYNPROXY=m
CONFIG_NF_TABLES=m
CONFIG_NF_TABLES_INET=y
CONFIG_NF_TABLES_NETDEV=y
CONFIG_NFT_NUMGEN=m
CONFIG_NFT_CT=m
CONFIG_NFT_COUNTER=m
CONFIG_NFT_CONNLIMIT=m
CONFIG_NFT_LOG=m
CONFIG_NFT_LIMIT=m
CONFIG_NFT_MASQ=m
CONFIG_NFT_REDIR=m
CONFIG_NFT_NAT=m
# CONFIG_NFT_TUNNEL is not set
CONFIG_NFT_OBJREF=m
CONFIG_NFT_QUEUE=m
CONFIG_NFT_QUOTA=m
CONFIG_NFT_REJECT=m
CONFIG_NFT_REJECT_INET=m
CONFIG_NFT_COMPAT=m
CONFIG_NFT_HASH=m
CONFIG_NFT_FIB=m
CONFIG_NFT_FIB_INET=m
# CONFIG_NFT_XFRM is not set
CONFIG_NFT_SOCKET=m
# CONFIG_NFT_OSF is not set
# CONFIG_NFT_TPROXY is not set
# CONFIG_NFT_SYNPROXY is not set
CONFIG_NF_DUP_NETDEV=m
CONFIG_NFT_DUP_NETDEV=m
CONFIG_NFT_FWD_NETDEV=m
CONFIG_NFT_FIB_NETDEV=m
# CONFIG_NFT_REJECT_NETDEV is not set
# CONFIG_NF_FLOW_TABLE is not set
CONFIG_NETFILTER_XTABLES=y

#
# Xtables combined modules
#
CONFIG_NETFILTER_XT_MARK=m
CONFIG_NETFILTER_XT_CONNMARK=m
CONFIG_NETFILTER_XT_SET=m

#
# Xtables targets
#
CONFIG_NETFILTER_XT_TARGET_AUDIT=m
CONFIG_NETFILTER_XT_TARGET_CHECKSUM=m
CONFIG_NETFILTER_XT_TARGET_CLASSIFY=m
CONFIG_NETFILTER_XT_TARGET_CONNMARK=m
CONFIG_NETFILTER_XT_TARGET_CONNSECMARK=m
CONFIG_NETFILTER_XT_TARGET_CT=m
CONFIG_NETFILTER_XT_TARGET_DSCP=m
CONFIG_NETFILTER_XT_TARGET_HL=m
CONFIG_NETFILTER_XT_TARGET_HMARK=m
CONFIG_NETFILTER_XT_TARGET_IDLETIMER=m
# CONFIG_NETFILTER_XT_TARGET_LED is not set
CONFIG_NETFILTER_XT_TARGET_LOG=m
CONFIG_NETFILTER_XT_TARGET_MARK=m
CONFIG_NETFILTER_XT_NAT=m
CONFIG_NETFILTER_XT_TARGET_NETMAP=m
CONFIG_NETFILTER_XT_TARGET_NFLOG=m
CONFIG_NETFILTER_XT_TARGET_NFQUEUE=m
CONFIG_NETFILTER_XT_TARGET_NOTRACK=m
CONFIG_NETFILTER_XT_TARGET_RATEEST=m
CONFIG_NETFILTER_XT_TARGET_REDIRECT=m
CONFIG_NETFILTER_XT_TARGET_MASQUERADE=m
CONFIG_NETFILTER_XT_TARGET_TEE=m
CONFIG_NETFILTER_XT_TARGET_TPROXY=m
CONFIG_NETFILTER_XT_TARGET_TRACE=m
CONFIG_NETFILTER_XT_TARGET_SECMARK=m
CONFIG_NETFILTER_XT_TARGET_TCPMSS=m
CONFIG_NETFILTER_XT_TARGET_TCPOPTSTRIP=m

#
# Xtables matches
#
CONFIG_NETFILTER_XT_MATCH_ADDRTYPE=m
CONFIG_NETFILTER_XT_MATCH_BPF=m
CONFIG_NETFILTER_XT_MATCH_CGROUP=m
CONFIG_NETFILTER_XT_MATCH_CLUSTER=m
CONFIG_NETFILTER_XT_MATCH_COMMENT=m
CONFIG_NETFILTER_XT_MATCH_CONNBYTES=m
CONFIG_NETFILTER_XT_MATCH_CONNLABEL=m
CONFIG_NETFILTER_XT_MATCH_CONNLIMIT=m
CONFIG_NETFILTER_XT_MATCH_CONNMARK=m
CONFIG_NETFILTER_XT_MATCH_CONNTRACK=m
CONFIG_NETFILTER_XT_MATCH_CPU=m
CONFIG_NETFILTER_XT_MATCH_DCCP=m
CONFIG_NETFILTER_XT_MATCH_DEVGROUP=m
CONFIG_NETFILTER_XT_MATCH_DSCP=m
CONFIG_NETFILTER_XT_MATCH_ECN=m
CONFIG_NETFILTER_XT_MATCH_ESP=m
CONFIG_NETFILTER_XT_MATCH_HASHLIMIT=m
CONFIG_NETFILTER_XT_MATCH_HELPER=m
CONFIG_NETFILTER_XT_MATCH_HL=m
# CONFIG_NETFILTER_XT_MATCH_IPCOMP is not set
CONFIG_NETFILTER_XT_MATCH_IPRANGE=m
CONFIG_NETFILTER_XT_MATCH_IPVS=m
# CONFIG_NETFILTER_XT_MATCH_L2TP is not set
CONFIG_NETFILTER_XT_MATCH_LENGTH=m
CONFIG_NETFILTER_XT_MATCH_LIMIT=m
CONFIG_NETFILTER_XT_MATCH_MAC=m
CONFIG_NETFILTER_XT_MATCH_MARK=m
CONFIG_NETFILTER_XT_MATCH_MULTIPORT=m
# CONFIG_NETFILTER_XT_MATCH_NFACCT is not set
CONFIG_NETFILTER_XT_MATCH_OSF=m
CONFIG_NETFILTER_XT_MATCH_OWNER=m
CONFIG_NETFILTER_XT_MATCH_POLICY=m
CONFIG_NETFILTER_XT_MATCH_PHYSDEV=m
CONFIG_NETFILTER_XT_MATCH_PKTTYPE=m
CONFIG_NETFILTER_XT_MATCH_QUOTA=m
CONFIG_NETFILTER_XT_MATCH_RATEEST=m
CONFIG_NETFILTER_XT_MATCH_REALM=m
CONFIG_NETFILTER_XT_MATCH_RECENT=m
CONFIG_NETFILTER_XT_MATCH_SCTP=m
CONFIG_NETFILTER_XT_MATCH_SOCKET=m
CONFIG_NETFILTER_XT_MATCH_STATE=m
CONFIG_NETFILTER_XT_MATCH_STATISTIC=m
CONFIG_NETFILTER_XT_MATCH_STRING=m
CONFIG_NETFILTER_XT_MATCH_TCPMSS=m
# CONFIG_NETFILTER_XT_MATCH_TIME is not set
# CONFIG_NETFILTER_XT_MATCH_U32 is not set
# end of Core Netfilter Configuration

CONFIG_IP_SET=m
CONFIG_IP_SET_MAX=256
CONFIG_IP_SET_BITMAP_IP=m
CONFIG_IP_SET_BITMAP_IPMAC=m
CONFIG_IP_SET_BITMAP_PORT=m
CONFIG_IP_SET_HASH_IP=m
CONFIG_IP_SET_HASH_IPMARK=m
CONFIG_IP_SET_HASH_IPPORT=m
CONFIG_IP_SET_HASH_IPPORTIP=m
CONFIG_IP_SET_HASH_IPPORTNET=m
CONFIG_IP_SET_HASH_IPMAC=m
CONFIG_IP_SET_HASH_MAC=m
CONFIG_IP_SET_HASH_NETPORTNET=m
CONFIG_IP_SET_HASH_NET=m
CONFIG_IP_SET_HASH_NETNET=m
CONFIG_IP_SET_HASH_NETPORT=m
CONFIG_IP_SET_HASH_NETIFACE=m
CONFIG_IP_SET_LIST_SET=m
CONFIG_IP_VS=m
CONFIG_IP_VS_IPV6=y
# CONFIG_IP_VS_DEBUG is not set
CONFIG_IP_VS_TAB_BITS=12

#
# IPVS transport protocol load balancing support
#
CONFIG_IP_VS_PROTO_TCP=y
CONFIG_IP_VS_PROTO_UDP=y
CONFIG_IP_VS_PROTO_AH_ESP=y
CONFIG_IP_VS_PROTO_ESP=y
CONFIG_IP_VS_PROTO_AH=y
CONFIG_IP_VS_PROTO_SCTP=y

#
# IPVS scheduler
#
CONFIG_IP_VS_RR=m
CONFIG_IP_VS_WRR=m
CONFIG_IP_VS_LC=m
CONFIG_IP_VS_WLC=m
CONFIG_IP_VS_FO=m
CONFIG_IP_VS_OVF=m
CONFIG_IP_VS_LBLC=m
CONFIG_IP_VS_LBLCR=m
CONFIG_IP_VS_DH=m
CONFIG_IP_VS_SH=m
# CONFIG_IP_VS_MH is not set
CONFIG_IP_VS_SED=m
CONFIG_IP_VS_NQ=m
# CONFIG_IP_VS_TWOS is not set

#
# IPVS SH scheduler
#
CONFIG_IP_VS_SH_TAB_BITS=8

#
# IPVS MH scheduler
#
CONFIG_IP_VS_MH_TAB_INDEX=12

#
# IPVS application helper
#
CONFIG_IP_VS_FTP=m
CONFIG_IP_VS_NFCT=y
CONFIG_IP_VS_PE_SIP=m

#
# IP: Netfilter Configuration
#
CONFIG_NF_DEFRAG_IPV4=m
CONFIG_NF_SOCKET_IPV4=m
CONFIG_NF_TPROXY_IPV4=m
CONFIG_NF_TABLES_IPV4=y
CONFIG_NFT_REJECT_IPV4=m
CONFIG_NFT_DUP_IPV4=m
CONFIG_NFT_FIB_IPV4=m
CONFIG_NF_TABLES_ARP=y
CONFIG_NF_DUP_IPV4=m
CONFIG_NF_LOG_ARP=m
CONFIG_NF_LOG_IPV4=m
CONFIG_NF_REJECT_IPV4=m
CONFIG_NF_NAT_SNMP_BASIC=m
CONFIG_NF_NAT_PPTP=m
CONFIG_NF_NAT_H323=m
CONFIG_IP_NF_IPTABLES=m
CONFIG_IP_NF_MATCH_AH=m
CONFIG_IP_NF_MATCH_ECN=m
CONFIG_IP_NF_MATCH_RPFILTER=m
CONFIG_IP_NF_MATCH_TTL=m
CONFIG_IP_NF_FILTER=m
CONFIG_IP_NF_TARGET_REJECT=m
CONFIG_IP_NF_TARGET_SYNPROXY=m
CONFIG_IP_NF_NAT=m
CONFIG_IP_NF_TARGET_MASQUERADE=m
CONFIG_IP_NF_TARGET_NETMAP=m
CONFIG_IP_NF_TARGET_REDIRECT=m
CONFIG_IP_NF_MANGLE=m
# CONFIG_IP_NF_TARGET_CLUSTERIP is not set
CONFIG_IP_NF_TARGET_ECN=m
CONFIG_IP_NF_TARGET_TTL=m
CONFIG_IP_NF_RAW=m
CONFIG_IP_NF_SECURITY=m
CONFIG_IP_NF_ARPTABLES=m
CONFIG_IP_NF_ARPFILTER=m
CONFIG_IP_NF_ARP_MANGLE=m
# end of IP: Netfilter Configuration

#
# IPv6: Netfilter Configuration
#
CONFIG_NF_SOCKET_IPV6=m
CONFIG_NF_TPROXY_IPV6=m
CONFIG_NF_TABLES_IPV6=y
CONFIG_NFT_REJECT_IPV6=m
CONFIG_NFT_DUP_IPV6=m
CONFIG_NFT_FIB_IPV6=m
CONFIG_NF_DUP_IPV6=m
CONFIG_NF_REJECT_IPV6=m
CONFIG_NF_LOG_IPV6=m
CONFIG_IP6_NF_IPTABLES=m
CONFIG_IP6_NF_MATCH_AH=m
CONFIG_IP6_NF_MATCH_EUI64=m
CONFIG_IP6_NF_MATCH_FRAG=m
CONFIG_IP6_NF_MATCH_OPTS=m
CONFIG_IP6_NF_MATCH_HL=m
CONFIG_IP6_NF_MATCH_IPV6HEADER=m
CONFIG_IP6_NF_MATCH_MH=m
CONFIG_IP6_NF_MATCH_RPFILTER=m
CONFIG_IP6_NF_MATCH_RT=m
# CONFIG_IP6_NF_MATCH_SRH is not set
# CONFIG_IP6_NF_TARGET_HL is not set
CONFIG_IP6_NF_FILTER=m
CONFIG_IP6_NF_TARGET_REJECT=m
CONFIG_IP6_NF_TARGET_SYNPROXY=m
CONFIG_IP6_NF_MANGLE=m
CONFIG_IP6_NF_RAW=m
CONFIG_IP6_NF_SECURITY=m
CONFIG_IP6_NF_NAT=m
CONFIG_IP6_NF_TARGET_MASQUERADE=m
CONFIG_IP6_NF_TARGET_NPT=m
# end of IPv6: Netfilter Configuration

CONFIG_NF_DEFRAG_IPV6=m
CONFIG_NF_TABLES_BRIDGE=m
# CONFIG_NFT_BRIDGE_META is not set
CONFIG_NFT_BRIDGE_REJECT=m
CONFIG_NF_LOG_BRIDGE=m
# CONFIG_NF_CONNTRACK_BRIDGE is not set
CONFIG_BRIDGE_NF_EBTABLES=m
CONFIG_BRIDGE_EBT_BROUTE=m
CONFIG_BRIDGE_EBT_T_FILTER=m
CONFIG_BRIDGE_EBT_T_NAT=m
CONFIG_BRIDGE_EBT_802_3=m
CONFIG_BRIDGE_EBT_AMONG=m
CONFIG_BRIDGE_EBT_ARP=m
CONFIG_BRIDGE_EBT_IP=m
CONFIG_BRIDGE_EBT_IP6=m
CONFIG_BRIDGE_EBT_LIMIT=m
CONFIG_BRIDGE_EBT_MARK=m
CONFIG_BRIDGE_EBT_PKTTYPE=m
CONFIG_BRIDGE_EBT_STP=m
CONFIG_BRIDGE_EBT_VLAN=m
CONFIG_BRIDGE_EBT_ARPREPLY=m
CONFIG_BRIDGE_EBT_DNAT=m
CONFIG_BRIDGE_EBT_MARK_T=m
CONFIG_BRIDGE_EBT_REDIRECT=m
CONFIG_BRIDGE_EBT_SNAT=m
CONFIG_BRIDGE_EBT_LOG=m
CONFIG_BRIDGE_EBT_NFLOG=m
# CONFIG_BPFILTER is not set
# CONFIG_IP_DCCP is not set
CONFIG_IP_SCTP=m
# CONFIG_SCTP_DBG_OBJCNT is not set
# CONFIG_SCTP_DEFAULT_COOKIE_HMAC_MD5 is not set
CONFIG_SCTP_DEFAULT_COOKIE_HMAC_SHA1=y
# CONFIG_SCTP_DEFAULT_COOKIE_HMAC_NONE is not set
CONFIG_SCTP_COOKIE_HMAC_MD5=y
CONFIG_SCTP_COOKIE_HMAC_SHA1=y
CONFIG_INET_SCTP_DIAG=m
# CONFIG_RDS is not set
CONFIG_TIPC=m
# CONFIG_TIPC_MEDIA_IB is not set
CONFIG_TIPC_MEDIA_UDP=y
CONFIG_TIPC_CRYPTO=y
CONFIG_TIPC_DIAG=m
CONFIG_ATM=m
CONFIG_ATM_CLIP=m
# CONFIG_ATM_CLIP_NO_ICMP is not set
CONFIG_ATM_LANE=m
# CONFIG_ATM_MPOA is not set
CONFIG_ATM_BR2684=m
# CONFIG_ATM_BR2684_IPFILTER is not set
CONFIG_L2TP=m
CONFIG_L2TP_DEBUGFS=m
CONFIG_L2TP_V3=y
CONFIG_L2TP_IP=m
CONFIG_L2TP_ETH=m
CONFIG_STP=m
CONFIG_GARP=m
CONFIG_MRP=m
CONFIG_BRIDGE=m
CONFIG_BRIDGE_IGMP_SNOOPING=y
CONFIG_BRIDGE_VLAN_FILTERING=y
# CONFIG_BRIDGE_MRP is not set
# CONFIG_BRIDGE_CFM is not set
CONFIG_HAVE_NET_DSA=y
# CONFIG_NET_DSA is not set
CONFIG_VLAN_8021Q=m
CONFIG_VLAN_8021Q_GVRP=y
CONFIG_VLAN_8021Q_MVRP=y
# CONFIG_DECNET is not set
CONFIG_LLC=m
# CONFIG_LLC2 is not set
# CONFIG_ATALK is not set
# CONFIG_X25 is not set
# CONFIG_LAPB is not set
# CONFIG_PHONET is not set
CONFIG_6LOWPAN=m
# CONFIG_6LOWPAN_DEBUGFS is not set
# CONFIG_6LOWPAN_NHC is not set
CONFIG_IEEE802154=m
# CONFIG_IEEE802154_NL802154_EXPERIMENTAL is not set
CONFIG_IEEE802154_SOCKET=m
CONFIG_IEEE802154_6LOWPAN=m
CONFIG_MAC802154=m
CONFIG_NET_SCHED=y

#
# Queueing/Scheduling
#
CONFIG_NET_SCH_CBQ=m
CONFIG_NET_SCH_HTB=m
CONFIG_NET_SCH_HFSC=m
CONFIG_NET_SCH_ATM=m
CONFIG_NET_SCH_PRIO=m
CONFIG_NET_SCH_MULTIQ=m
CONFIG_NET_SCH_RED=m
CONFIG_NET_SCH_SFB=m
CONFIG_NET_SCH_SFQ=m
CONFIG_NET_SCH_TEQL=m
CONFIG_NET_SCH_TBF=m
# CONFIG_NET_SCH_CBS is not set
# CONFIG_NET_SCH_ETF is not set
# CONFIG_NET_SCH_TAPRIO is not set
CONFIG_NET_SCH_GRED=m
CONFIG_NET_SCH_DSMARK=m
CONFIG_NET_SCH_NETEM=m
CONFIG_NET_SCH_DRR=m
CONFIG_NET_SCH_MQPRIO=m
# CONFIG_NET_SCH_SKBPRIO is not set
CONFIG_NET_SCH_CHOKE=m
CONFIG_NET_SCH_QFQ=m
CONFIG_NET_SCH_CODEL=m
CONFIG_NET_SCH_FQ_CODEL=y
# CONFIG_NET_SCH_CAKE is not set
CONFIG_NET_SCH_FQ=m
CONFIG_NET_SCH_HHF=m
CONFIG_NET_SCH_PIE=m
# CONFIG_NET_SCH_FQ_PIE is not set
CONFIG_NET_SCH_INGRESS=m
CONFIG_NET_SCH_PLUG=m
# CONFIG_NET_SCH_ETS is not set
CONFIG_NET_SCH_DEFAULT=y
# CONFIG_DEFAULT_FQ is not set
# CONFIG_DEFAULT_CODEL is not set
CONFIG_DEFAULT_FQ_CODEL=y
# CONFIG_DEFAULT_SFQ is not set
# CONFIG_DEFAULT_PFIFO_FAST is not set
CONFIG_DEFAULT_NET_SCH="fq_codel"

#
# Classification
#
CONFIG_NET_CLS=y
CONFIG_NET_CLS_BASIC=m
CONFIG_NET_CLS_TCINDEX=m
CONFIG_NET_CLS_ROUTE4=m
CONFIG_NET_CLS_FW=m
CONFIG_NET_CLS_U32=m
CONFIG_CLS_U32_PERF=y
CONFIG_CLS_U32_MARK=y
CONFIG_NET_CLS_RSVP=m
CONFIG_NET_CLS_RSVP6=m
CONFIG_NET_CLS_FLOW=m
CONFIG_NET_CLS_CGROUP=y
CONFIG_NET_CLS_BPF=m
CONFIG_NET_CLS_FLOWER=m
CONFIG_NET_CLS_MATCHALL=m
CONFIG_NET_EMATCH=y
CONFIG_NET_EMATCH_STACK=32
CONFIG_NET_EMATCH_CMP=m
CONFIG_NET_EMATCH_NBYTE=m
CONFIG_NET_EMATCH_U32=m
CONFIG_NET_EMATCH_META=m
CONFIG_NET_EMATCH_TEXT=m
# CONFIG_NET_EMATCH_CANID is not set
CONFIG_NET_EMATCH_IPSET=m
# CONFIG_NET_EMATCH_IPT is not set
CONFIG_NET_CLS_ACT=y
CONFIG_NET_ACT_POLICE=m
CONFIG_NET_ACT_GACT=m
CONFIG_GACT_PROB=y
CONFIG_NET_ACT_MIRRED=m
CONFIG_NET_ACT_SAMPLE=m
# CONFIG_NET_ACT_IPT is not set
CONFIG_NET_ACT_NAT=m
CONFIG_NET_ACT_PEDIT=m
CONFIG_NET_ACT_SIMP=m
CONFIG_NET_ACT_SKBEDIT=m
CONFIG_NET_ACT_CSUM=m
# CONFIG_NET_ACT_MPLS is not set
CONFIG_NET_ACT_VLAN=m
CONFIG_NET_ACT_BPF=m
# CONFIG_NET_ACT_CONNMARK is not set
# CONFIG_NET_ACT_CTINFO is not set
CONFIG_NET_ACT_SKBMOD=m
# CONFIG_NET_ACT_IFE is not set
CONFIG_NET_ACT_TUNNEL_KEY=m
# CONFIG_NET_ACT_GATE is not set
# CONFIG_NET_TC_SKB_EXT is not set
CONFIG_NET_SCH_FIFO=y
CONFIG_DCB=y
CONFIG_DNS_RESOLVER=m
# CONFIG_BATMAN_ADV is not set
CONFIG_OPENVSWITCH=m
CONFIG_OPENVSWITCH_GRE=m
CONFIG_VSOCKETS=m
CONFIG_VSOCKETS_DIAG=m
CONFIG_VSOCKETS_LOOPBACK=m
CONFIG_VMWARE_VMCI_VSOCKETS=m
CONFIG_VIRTIO_VSOCKETS=m
CONFIG_VIRTIO_VSOCKETS_COMMON=m
CONFIG_HYPERV_VSOCKETS=m
CONFIG_NETLINK_DIAG=m
CONFIG_MPLS=y
CONFIG_NET_MPLS_GSO=y
CONFIG_MPLS_ROUTING=m
CONFIG_MPLS_IPTUNNEL=m
CONFIG_NET_NSH=y
# CONFIG_HSR is not set
CONFIG_NET_SWITCHDEV=y
CONFIG_NET_L3_MASTER_DEV=y
# CONFIG_QRTR is not set
# CONFIG_NET_NCSI is not set
CONFIG_RPS=y
CONFIG_RFS_ACCEL=y
CONFIG_SOCK_RX_QUEUE_MAPPING=y
CONFIG_XPS=y
CONFIG_CGROUP_NET_PRIO=y
CONFIG_CGROUP_NET_CLASSID=y
CONFIG_NET_RX_BUSY_POLL=y
CONFIG_BQL=y
CONFIG_BPF_JIT=y
CONFIG_BPF_STREAM_PARSER=y
CONFIG_NET_FLOW_LIMIT=y

#
# Network testing
#
CONFIG_NET_PKTGEN=m
CONFIG_NET_DROP_MONITOR=y
# end of Network testing
# end of Networking options

# CONFIG_HAMRADIO is not set
CONFIG_CAN=m
CONFIG_CAN_RAW=m
CONFIG_CAN_BCM=m
CONFIG_CAN_GW=m
# CONFIG_CAN_J1939 is not set
# CONFIG_CAN_ISOTP is not set

#
# CAN Device Drivers
#
CONFIG_CAN_VCAN=m
# CONFIG_CAN_VXCAN is not set
CONFIG_CAN_SLCAN=m
CONFIG_CAN_DEV=m
CONFIG_CAN_CALC_BITTIMING=y
# CONFIG_CAN_KVASER_PCIEFD is not set
CONFIG_CAN_C_CAN=m
CONFIG_CAN_C_CAN_PLATFORM=m
CONFIG_CAN_C_CAN_PCI=m
CONFIG_CAN_CC770=m
# CONFIG_CAN_CC770_ISA is not set
CONFIG_CAN_CC770_PLATFORM=m
# CONFIG_CAN_IFI_CANFD is not set
# CONFIG_CAN_M_CAN is not set
# CONFIG_CAN_PEAK_PCIEFD is not set
CONFIG_CAN_SJA1000=m
CONFIG_CAN_EMS_PCI=m
# CONFIG_CAN_F81601 is not set
CONFIG_CAN_KVASER_PCI=m
CONFIG_CAN_PEAK_PCI=m
CONFIG_CAN_PEAK_PCIEC=y
CONFIG_CAN_PLX_PCI=m
# CONFIG_CAN_SJA1000_ISA is not set
CONFIG_CAN_SJA1000_PLATFORM=m
CONFIG_CAN_SOFTING=m

#
# CAN SPI interfaces
#
# CONFIG_CAN_HI311X is not set
# CONFIG_CAN_MCP251X is not set
# CONFIG_CAN_MCP251XFD is not set
# end of CAN SPI interfaces

#
# CAN USB interfaces
#
# CONFIG_CAN_8DEV_USB is not set
# CONFIG_CAN_EMS_USB is not set
# CONFIG_CAN_ESD_USB2 is not set
# CONFIG_CAN_GS_USB is not set
# CONFIG_CAN_KVASER_USB is not set
# CONFIG_CAN_MCBA_USB is not set
# CONFIG_CAN_PEAK_USB is not set
# CONFIG_CAN_UCAN is not set
# end of CAN USB interfaces

# CONFIG_CAN_DEBUG_DEVICES is not set
# end of CAN Device Drivers

CONFIG_BT=m
CONFIG_BT_BREDR=y
CONFIG_BT_RFCOMM=m
CONFIG_BT_RFCOMM_TTY=y
CONFIG_BT_BNEP=m
CONFIG_BT_BNEP_MC_FILTER=y
CONFIG_BT_BNEP_PROTO_FILTER=y
CONFIG_BT_HIDP=m
CONFIG_BT_HS=y
CONFIG_BT_LE=y
# CONFIG_BT_6LOWPAN is not set
# CONFIG_BT_LEDS is not set
# CONFIG_BT_MSFTEXT is not set
CONFIG_BT_DEBUGFS=y
# CONFIG_BT_SELFTEST is not set

#
# Bluetooth device drivers
#
# CONFIG_BT_HCIBTUSB is not set
# CONFIG_BT_HCIBTSDIO is not set
CONFIG_BT_HCIUART=m
CONFIG_BT_HCIUART_H4=y
CONFIG_BT_HCIUART_BCSP=y
CONFIG_BT_HCIUART_ATH3K=y
# CONFIG_BT_HCIUART_INTEL is not set
# CONFIG_BT_HCIUART_AG6XX is not set
# CONFIG_BT_HCIBCM203X is not set
# CONFIG_BT_HCIBPA10X is not set
# CONFIG_BT_HCIBFUSB is not set
CONFIG_BT_HCIVHCI=m
CONFIG_BT_MRVL=m
# CONFIG_BT_MRVL_SDIO is not set
# CONFIG_BT_MTKSDIO is not set
# end of Bluetooth device drivers

# CONFIG_AF_RXRPC is not set
# CONFIG_AF_KCM is not set
CONFIG_STREAM_PARSER=y
CONFIG_FIB_RULES=y
CONFIG_WIRELESS=y
CONFIG_WEXT_CORE=y
CONFIG_WEXT_PROC=y
CONFIG_CFG80211=m
# CONFIG_NL80211_TESTMODE is not set
# CONFIG_CFG80211_DEVELOPER_WARNINGS is not set
CONFIG_CFG80211_REQUIRE_SIGNED_REGDB=y
CONFIG_CFG80211_USE_KERNEL_REGDB_KEYS=y
CONFIG_CFG80211_DEFAULT_PS=y
# CONFIG_CFG80211_DEBUGFS is not set
CONFIG_CFG80211_CRDA_SUPPORT=y
CONFIG_CFG80211_WEXT=y
CONFIG_MAC80211=m
CONFIG_MAC80211_HAS_RC=y
CONFIG_MAC80211_RC_MINSTREL=y
CONFIG_MAC80211_RC_DEFAULT_MINSTREL=y
CONFIG_MAC80211_RC_DEFAULT="minstrel_ht"
CONFIG_MAC80211_MESH=y
CONFIG_MAC80211_LEDS=y
CONFIG_MAC80211_DEBUGFS=y
# CONFIG_MAC80211_MESSAGE_TRACING is not set
# CONFIG_MAC80211_DEBUG_MENU is not set
CONFIG_MAC80211_STA_HASH_MAX_SIZE=0
CONFIG_RFKILL=m
CONFIG_RFKILL_LEDS=y
CONFIG_RFKILL_INPUT=y
# CONFIG_RFKILL_GPIO is not set
CONFIG_NET_9P=y
CONFIG_NET_9P_VIRTIO=y
# CONFIG_NET_9P_XEN is not set
# CONFIG_NET_9P_RDMA is not set
# CONFIG_NET_9P_DEBUG is not set
# CONFIG_CAIF is not set
CONFIG_CEPH_LIB=m
# CONFIG_CEPH_LIB_PRETTYDEBUG is not set
CONFIG_CEPH_LIB_USE_DNS_RESOLVER=y
# CONFIG_NFC is not set
CONFIG_PSAMPLE=m
# CONFIG_NET_IFE is not set
CONFIG_LWTUNNEL=y
CONFIG_LWTUNNEL_BPF=y
CONFIG_DST_CACHE=y
CONFIG_GRO_CELLS=y
CONFIG_SOCK_VALIDATE_XMIT=y
CONFIG_NET_SOCK_MSG=y
CONFIG_NET_DEVLINK=y
CONFIG_PAGE_POOL=y
CONFIG_FAILOVER=m
CONFIG_ETHTOOL_NETLINK=y
CONFIG_HAVE_EBPF_JIT=y

#
# Device Drivers
#
CONFIG_HAVE_EISA=y
# CONFIG_EISA is not set
CONFIG_HAVE_PCI=y
CONFIG_PCI=y
CONFIG_PCI_DOMAINS=y
CONFIG_PCIEPORTBUS=y
CONFIG_HOTPLUG_PCI_PCIE=y
CONFIG_PCIEAER=y
CONFIG_PCIEAER_INJECT=m
CONFIG_PCIE_ECRC=y
CONFIG_PCIEASPM=y
CONFIG_PCIEASPM_DEFAULT=y
# CONFIG_PCIEASPM_POWERSAVE is not set
# CONFIG_PCIEASPM_POWER_SUPERSAVE is not set
# CONFIG_PCIEASPM_PERFORMANCE is not set
CONFIG_PCIE_PME=y
CONFIG_PCIE_DPC=y
# CONFIG_PCIE_PTM is not set
# CONFIG_PCIE_EDR is not set
CONFIG_PCI_MSI=y
CONFIG_PCI_MSI_IRQ_DOMAIN=y
CONFIG_PCI_QUIRKS=y
# CONFIG_PCI_DEBUG is not set
# CONFIG_PCI_REALLOC_ENABLE_AUTO is not set
CONFIG_PCI_STUB=y
CONFIG_PCI_PF_STUB=m
# CONFIG_XEN_PCIDEV_FRONTEND is not set
CONFIG_PCI_ATS=y
CONFIG_PCI_LOCKLESS_CONFIG=y
CONFIG_PCI_IOV=y
CONFIG_PCI_PRI=y
CONFIG_PCI_PASID=y
# CONFIG_PCI_P2PDMA is not set
CONFIG_PCI_LABEL=y
CONFIG_PCI_HYPERV=m
CONFIG_HOTPLUG_PCI=y
CONFIG_HOTPLUG_PCI_ACPI=y
CONFIG_HOTPLUG_PCI_ACPI_IBM=m
# CONFIG_HOTPLUG_PCI_CPCI is not set
CONFIG_HOTPLUG_PCI_SHPC=y

#
# PCI controller drivers
#
CONFIG_VMD=y
CONFIG_PCI_HYPERV_INTERFACE=m

#
# DesignWare PCI Core Support
#
# CONFIG_PCIE_DW_PLAT_HOST is not set
# CONFIG_PCI_MESON is not set
# end of DesignWare PCI Core Support

#
# Mobiveil PCIe Core Support
#
# end of Mobiveil PCIe Core Support

#
# Cadence PCIe controllers support
#
# end of Cadence PCIe controllers support
# end of PCI controller drivers

#
# PCI Endpoint
#
# CONFIG_PCI_ENDPOINT is not set
# end of PCI Endpoint

#
# PCI switch controller drivers
#
# CONFIG_PCI_SW_SWITCHTEC is not set
# end of PCI switch controller drivers

# CONFIG_CXL_BUS is not set
# CONFIG_PCCARD is not set
# CONFIG_RAPIDIO is not set

#
# Generic Driver Options
#
# CONFIG_UEVENT_HELPER is not set
CONFIG_DEVTMPFS=y
CONFIG_DEVTMPFS_MOUNT=y
CONFIG_STANDALONE=y
CONFIG_PREVENT_FIRMWARE_BUILD=y

#
# Firmware loader
#
CONFIG_FW_LOADER=y
CONFIG_FW_LOADER_PAGED_BUF=y
CONFIG_EXTRA_FIRMWARE=""
CONFIG_FW_LOADER_USER_HELPER=y
# CONFIG_FW_LOADER_USER_HELPER_FALLBACK is not set
# CONFIG_FW_LOADER_COMPRESS is not set
CONFIG_FW_CACHE=y
# end of Firmware loader

CONFIG_ALLOW_DEV_COREDUMP=y
# CONFIG_DEBUG_DRIVER is not set
# CONFIG_DEBUG_DEVRES is not set
# CONFIG_DEBUG_TEST_DRIVER_REMOVE is not set
# CONFIG_PM_QOS_KUNIT_TEST is not set
# CONFIG_TEST_ASYNC_DRIVER_PROBE is not set
CONFIG_KUNIT_DRIVER_PE_TEST=y
CONFIG_SYS_HYPERVISOR=y
CONFIG_GENERIC_CPU_AUTOPROBE=y
CONFIG_GENERIC_CPU_VULNERABILITIES=y
CONFIG_REGMAP=y
CONFIG_REGMAP_I2C=m
CONFIG_REGMAP_SPI=m
CONFIG_DMA_SHARED_BUFFER=y
# CONFIG_DMA_FENCE_TRACE is not set
# end of Generic Driver Options

#
# Bus devices
#
# CONFIG_MHI_BUS is not set
# end of Bus devices

CONFIG_CONNECTOR=y
CONFIG_PROC_EVENTS=y
# CONFIG_GNSS is not set
# CONFIG_MTD is not set
# CONFIG_OF is not set
CONFIG_ARCH_MIGHT_HAVE_PC_PARPORT=y
CONFIG_PARPORT=m
CONFIG_PARPORT_PC=m
CONFIG_PARPORT_SERIAL=m
# CONFIG_PARPORT_PC_FIFO is not set
# CONFIG_PARPORT_PC_SUPERIO is not set
# CONFIG_PARPORT_AX88796 is not set
CONFIG_PARPORT_1284=y
CONFIG_PNP=y
# CONFIG_PNP_DEBUG_MESSAGES is not set

#
# Protocols
#
CONFIG_PNPACPI=y
CONFIG_BLK_DEV=y
CONFIG_BLK_DEV_NULL_BLK=m
CONFIG_BLK_DEV_NULL_BLK_FAULT_INJECTION=y
# CONFIG_BLK_DEV_FD is not set
CONFIG_CDROM=m
# CONFIG_PARIDE is not set
# CONFIG_BLK_DEV_PCIESSD_MTIP32XX is not set
# CONFIG_ZRAM is not set
# CONFIG_BLK_DEV_UMEM is not set
CONFIG_BLK_DEV_LOOP=m
CONFIG_BLK_DEV_LOOP_MIN_COUNT=0
# CONFIG_BLK_DEV_CRYPTOLOOP is not set
# CONFIG_BLK_DEV_DRBD is not set
CONFIG_BLK_DEV_NBD=m
# CONFIG_BLK_DEV_SX8 is not set
CONFIG_BLK_DEV_RAM=m
CONFIG_BLK_DEV_RAM_COUNT=16
CONFIG_BLK_DEV_RAM_SIZE=16384
CONFIG_CDROM_PKTCDVD=m
CONFIG_CDROM_PKTCDVD_BUFFERS=8
# CONFIG_CDROM_PKTCDVD_WCACHE is not set
# CONFIG_ATA_OVER_ETH is not set
CONFIG_XEN_BLKDEV_FRONTEND=m
CONFIG_VIRTIO_BLK=m
CONFIG_BLK_DEV_RBD=m
# CONFIG_BLK_DEV_RSXX is not set

#
# NVME Support
#
CONFIG_NVME_CORE=m
CONFIG_BLK_DEV_NVME=m
CONFIG_NVME_MULTIPATH=y
# CONFIG_NVME_HWMON is not set
CONFIG_NVME_FABRICS=m
# CONFIG_NVME_RDMA is not set
CONFIG_NVME_FC=m
# CONFIG_NVME_TCP is not set
CONFIG_NVME_TARGET=m
# CONFIG_NVME_TARGET_PASSTHRU is not set
CONFIG_NVME_TARGET_LOOP=m
# CONFIG_NVME_TARGET_RDMA is not set
CONFIG_NVME_TARGET_FC=m
CONFIG_NVME_TARGET_FCLOOP=m
# CONFIG_NVME_TARGET_TCP is not set
# end of NVME Support

#
# Misc devices
#
CONFIG_SENSORS_LIS3LV02D=m
# CONFIG_AD525X_DPOT is not set
# CONFIG_DUMMY_IRQ is not set
# CONFIG_IBM_ASM is not set
# CONFIG_PHANTOM is not set
CONFIG_TIFM_CORE=m
CONFIG_TIFM_7XX1=m
# CONFIG_ICS932S401 is not set
CONFIG_ENCLOSURE_SERVICES=m
CONFIG_SGI_XP=m
CONFIG_HP_ILO=m
CONFIG_SGI_GRU=m
# CONFIG_SGI_GRU_DEBUG is not set
CONFIG_APDS9802ALS=m
CONFIG_ISL29003=m
CONFIG_ISL29020=m
CONFIG_SENSORS_TSL2550=m
CONFIG_SENSORS_BH1770=m
CONFIG_SENSORS_APDS990X=m
# CONFIG_HMC6352 is not set
# CONFIG_DS1682 is not set
CONFIG_VMWARE_BALLOON=m
# CONFIG_LATTICE_ECP3_CONFIG is not set
# CONFIG_SRAM is not set
# CONFIG_PCI_ENDPOINT_TEST is not set
# CONFIG_XILINX_SDFEC is not set
CONFIG_MISC_RTSX=m
CONFIG_PVPANIC=y
# CONFIG_C2PORT is not set

#
# EEPROM support
#
# CONFIG_EEPROM_AT24 is not set
# CONFIG_EEPROM_AT25 is not set
CONFIG_EEPROM_LEGACY=m
CONFIG_EEPROM_MAX6875=m
CONFIG_EEPROM_93CX6=m
# CONFIG_EEPROM_93XX46 is not set
# CONFIG_EEPROM_IDT_89HPESX is not set
# CONFIG_EEPROM_EE1004 is not set
# end of EEPROM support

CONFIG_CB710_CORE=m
# CONFIG_CB710_DEBUG is not set
CONFIG_CB710_DEBUG_ASSUMPTIONS=y

#
# Texas Instruments shared transport line discipline
#
# CONFIG_TI_ST is not set
# end of Texas Instruments shared transport line discipline

CONFIG_SENSORS_LIS3_I2C=m
CONFIG_ALTERA_STAPL=m
CONFIG_INTEL_MEI=m
CONFIG_INTEL_MEI_ME=m
# CONFIG_INTEL_MEI_TXE is not set
# CONFIG_INTEL_MEI_HDCP is not set
CONFIG_VMWARE_VMCI=m
# CONFIG_GENWQE is not set
# CONFIG_ECHO is not set
# CONFIG_BCM_VK is not set
# CONFIG_MISC_ALCOR_PCI is not set
CONFIG_MISC_RTSX_PCI=m
# CONFIG_MISC_RTSX_USB is not set
# CONFIG_HABANA_AI is not set
# CONFIG_UACCE is not set
# end of Misc devices

CONFIG_HAVE_IDE=y
# CONFIG_IDE is not set

#
# SCSI device support
#
CONFIG_SCSI_MOD=y
CONFIG_RAID_ATTRS=m
CONFIG_SCSI=y
CONFIG_SCSI_DMA=y
CONFIG_SCSI_NETLINK=y
CONFIG_SCSI_PROC_FS=y

#
# SCSI support type (disk, tape, CD-ROM)
#
CONFIG_BLK_DEV_SD=m
CONFIG_CHR_DEV_ST=m
CONFIG_BLK_DEV_SR=m
CONFIG_CHR_DEV_SG=m
CONFIG_CHR_DEV_SCH=m
CONFIG_SCSI_ENCLOSURE=m
CONFIG_SCSI_CONSTANTS=y
CONFIG_SCSI_LOGGING=y
CONFIG_SCSI_SCAN_ASYNC=y

#
# SCSI Transports
#
CONFIG_SCSI_SPI_ATTRS=m
CONFIG_SCSI_FC_ATTRS=m
CONFIG_SCSI_ISCSI_ATTRS=m
CONFIG_SCSI_SAS_ATTRS=m
CONFIG_SCSI_SAS_LIBSAS=m
CONFIG_SCSI_SAS_ATA=y
CONFIG_SCSI_SAS_HOST_SMP=y
CONFIG_SCSI_SRP_ATTRS=m
# end of SCSI Transports

CONFIG_SCSI_LOWLEVEL=y
# CONFIG_ISCSI_TCP is not set
# CONFIG_ISCSI_BOOT_SYSFS is not set
# CONFIG_SCSI_CXGB3_ISCSI is not set
# CONFIG_SCSI_CXGB4_ISCSI is not set
# CONFIG_SCSI_BNX2_ISCSI is not set
# CONFIG_BE2ISCSI is not set
# CONFIG_BLK_DEV_3W_XXXX_RAID is not set
# CONFIG_SCSI_HPSA is not set
# CONFIG_SCSI_3W_9XXX is not set
# CONFIG_SCSI_3W_SAS is not set
# CONFIG_SCSI_ACARD is not set
# CONFIG_SCSI_AACRAID is not set
# CONFIG_SCSI_AIC7XXX is not set
# CONFIG_SCSI_AIC79XX is not set
# CONFIG_SCSI_AIC94XX is not set
# CONFIG_SCSI_MVSAS is not set
# CONFIG_SCSI_MVUMI is not set
# CONFIG_SCSI_DPT_I2O is not set
# CONFIG_SCSI_ADVANSYS is not set
# CONFIG_SCSI_ARCMSR is not set
# CONFIG_SCSI_ESAS2R is not set
# CONFIG_MEGARAID_NEWGEN is not set
# CONFIG_MEGARAID_LEGACY is not set
# CONFIG_MEGARAID_SAS is not set
CONFIG_SCSI_MPT3SAS=m
CONFIG_SCSI_MPT2SAS_MAX_SGE=128
CONFIG_SCSI_MPT3SAS_MAX_SGE=128
# CONFIG_SCSI_MPT2SAS is not set
# CONFIG_SCSI_SMARTPQI is not set
# CONFIG_SCSI_UFSHCD is not set
# CONFIG_SCSI_HPTIOP is not set
# CONFIG_SCSI_BUSLOGIC is not set
# CONFIG_SCSI_MYRB is not set
# CONFIG_SCSI_MYRS is not set
# CONFIG_VMWARE_PVSCSI is not set
# CONFIG_XEN_SCSI_FRONTEND is not set
CONFIG_HYPERV_STORAGE=m
# CONFIG_LIBFC is not set
# CONFIG_SCSI_SNIC is not set
# CONFIG_SCSI_DMX3191D is not set
# CONFIG_SCSI_FDOMAIN_PCI is not set
CONFIG_SCSI_ISCI=m
# CONFIG_SCSI_IPS is not set
# CONFIG_SCSI_INITIO is not set
# CONFIG_SCSI_INIA100 is not set
# CONFIG_SCSI_PPA is not set
# CONFIG_SCSI_IMM is not set
# CONFIG_SCSI_STEX is not set
# CONFIG_SCSI_SYM53C8XX_2 is not set
# CONFIG_SCSI_IPR is not set
# CONFIG_SCSI_QLOGIC_1280 is not set
# CONFIG_SCSI_QLA_FC is not set
# CONFIG_SCSI_QLA_ISCSI is not set
# CONFIG_SCSI_LPFC is not set
# CONFIG_SCSI_DC395x is not set
# CONFIG_SCSI_AM53C974 is not set
# CONFIG_SCSI_WD719X is not set
CONFIG_SCSI_DEBUG=m
# CONFIG_SCSI_PMCRAID is not set
# CONFIG_SCSI_PM8001 is not set
# CONFIG_SCSI_BFA_FC is not set
# CONFIG_SCSI_VIRTIO is not set
# CONFIG_SCSI_CHELSIO_FCOE is not set
CONFIG_SCSI_DH=y
CONFIG_SCSI_DH_RDAC=y
CONFIG_SCSI_DH_HP_SW=y
CONFIG_SCSI_DH_EMC=y
CONFIG_SCSI_DH_ALUA=y
# end of SCSI device support

CONFIG_ATA=m
CONFIG_SATA_HOST=y
CONFIG_PATA_TIMINGS=y
CONFIG_ATA_VERBOSE_ERROR=y
CONFIG_ATA_FORCE=y
CONFIG_ATA_ACPI=y
# CONFIG_SATA_ZPODD is not set
CONFIG_SATA_PMP=y

#
# Controllers with non-SFF native interface
#
CONFIG_SATA_AHCI=m
CONFIG_SATA_MOBILE_LPM_POLICY=0
CONFIG_SATA_AHCI_PLATFORM=m
# CONFIG_SATA_INIC162X is not set
# CONFIG_SATA_ACARD_AHCI is not set
# CONFIG_SATA_SIL24 is not set
CONFIG_ATA_SFF=y

#
# SFF controllers with custom DMA interface
#
# CONFIG_PDC_ADMA is not set
# CONFIG_SATA_QSTOR is not set
# CONFIG_SATA_SX4 is not set
CONFIG_ATA_BMDMA=y

#
# SATA SFF controllers with BMDMA
#
CONFIG_ATA_PIIX=m
# CONFIG_SATA_DWC is not set
# CONFIG_SATA_MV is not set
# CONFIG_SATA_NV is not set
# CONFIG_SATA_PROMISE is not set
# CONFIG_SATA_SIL is not set
# CONFIG_SATA_SIS is not set
# CONFIG_SATA_SVW is not set
# CONFIG_SATA_ULI is not set
# CONFIG_SATA_VIA is not set
# CONFIG_SATA_VITESSE is not set

#
# PATA SFF controllers with BMDMA
#
# CONFIG_PATA_ALI is not set
# CONFIG_PATA_AMD is not set
# CONFIG_PATA_ARTOP is not set
# CONFIG_PATA_ATIIXP is not set
# CONFIG_PATA_ATP867X is not set
# CONFIG_PATA_CMD64X is not set
# CONFIG_PATA_CYPRESS is not set
# CONFIG_PATA_EFAR is not set
# CONFIG_PATA_HPT366 is not set
# CONFIG_PATA_HPT37X is not set
# CONFIG_PATA_HPT3X2N is not set
# CONFIG_PATA_HPT3X3 is not set
# CONFIG_PATA_IT8213 is not set
# CONFIG_PATA_IT821X is not set
# CONFIG_PATA_JMICRON is not set
# CONFIG_PATA_MARVELL is not set
# CONFIG_PATA_NETCELL is not set
# CONFIG_PATA_NINJA32 is not set
# CONFIG_PATA_NS87415 is not set
# CONFIG_PATA_OLDPIIX is not set
# CONFIG_PATA_OPTIDMA is not set
# CONFIG_PATA_PDC2027X is not set
# CONFIG_PATA_PDC_OLD is not set
# CONFIG_PATA_RADISYS is not set
# CONFIG_PATA_RDC is not set
# CONFIG_PATA_SCH is not set
# CONFIG_PATA_SERVERWORKS is not set
# CONFIG_PATA_SIL680 is not set
# CONFIG_PATA_SIS is not set
# CONFIG_PATA_TOSHIBA is not set
# CONFIG_PATA_TRIFLEX is not set
# CONFIG_PATA_VIA is not set
# CONFIG_PATA_WINBOND is not set

#
# PIO-only SFF controllers
#
# CONFIG_PATA_CMD640_PCI is not set
# CONFIG_PATA_MPIIX is not set
# CONFIG_PATA_NS87410 is not set
# CONFIG_PATA_OPTI is not set
# CONFIG_PATA_RZ1000 is not set

#
# Generic fallback / legacy drivers
#
# CONFIG_PATA_ACPI is not set
CONFIG_ATA_GENERIC=m
# CONFIG_PATA_LEGACY is not set
CONFIG_MD=y
CONFIG_BLK_DEV_MD=y
CONFIG_MD_AUTODETECT=y
CONFIG_MD_LINEAR=m
CONFIG_MD_RAID0=m
CONFIG_MD_RAID1=m
CONFIG_MD_RAID10=m
CONFIG_MD_RAID456=m
CONFIG_MD_MULTIPATH=m
CONFIG_MD_FAULTY=m
CONFIG_MD_CLUSTER=m
# CONFIG_BCACHE is not set
CONFIG_BLK_DEV_DM_BUILTIN=y
CONFIG_BLK_DEV_DM=m
CONFIG_DM_DEBUG=y
CONFIG_DM_BUFIO=m
# CONFIG_DM_DEBUG_BLOCK_MANAGER_LOCKING is not set
CONFIG_DM_BIO_PRISON=m
CONFIG_DM_PERSISTENT_DATA=m
# CONFIG_DM_UNSTRIPED is not set
CONFIG_DM_CRYPT=m
CONFIG_DM_SNAPSHOT=m
CONFIG_DM_THIN_PROVISIONING=m
CONFIG_DM_CACHE=m
CONFIG_DM_CACHE_SMQ=m
CONFIG_DM_WRITECACHE=m
# CONFIG_DM_EBS is not set
CONFIG_DM_ERA=m
# CONFIG_DM_CLONE is not set
CONFIG_DM_MIRROR=m
CONFIG_DM_LOG_USERSPACE=m
CONFIG_DM_RAID=m
CONFIG_DM_ZERO=m
CONFIG_DM_MULTIPATH=m
CONFIG_DM_MULTIPATH_QL=m
CONFIG_DM_MULTIPATH_ST=m
# CONFIG_DM_MULTIPATH_HST is not set
# CONFIG_DM_MULTIPATH_IOA is not set
CONFIG_DM_DELAY=m
# CONFIG_DM_DUST is not set
CONFIG_DM_UEVENT=y
CONFIG_DM_FLAKEY=m
CONFIG_DM_VERITY=m
# CONFIG_DM_VERITY_VERIFY_ROOTHASH_SIG is not set
# CONFIG_DM_VERITY_FEC is not set
CONFIG_DM_SWITCH=m
CONFIG_DM_LOG_WRITES=m
CONFIG_DM_INTEGRITY=m
# CONFIG_DM_ZONED is not set
CONFIG_TARGET_CORE=m
CONFIG_TCM_IBLOCK=m
CONFIG_TCM_FILEIO=m
CONFIG_TCM_PSCSI=m
CONFIG_TCM_USER2=m
CONFIG_LOOPBACK_TARGET=m
CONFIG_ISCSI_TARGET=m
# CONFIG_SBP_TARGET is not set
# CONFIG_FUSION is not set

#
# IEEE 1394 (FireWire) support
#
CONFIG_FIREWIRE=m
CONFIG_FIREWIRE_OHCI=m
CONFIG_FIREWIRE_SBP2=m
CONFIG_FIREWIRE_NET=m
# CONFIG_FIREWIRE_NOSY is not set
# end of IEEE 1394 (FireWire) support

CONFIG_MACINTOSH_DRIVERS=y
CONFIG_MAC_EMUMOUSEBTN=y
CONFIG_NETDEVICES=y
CONFIG_MII=y
CONFIG_NET_CORE=y
# CONFIG_BONDING is not set
# CONFIG_DUMMY is not set
# CONFIG_WIREGUARD is not set
# CONFIG_EQUALIZER is not set
# CONFIG_NET_FC is not set
# CONFIG_IFB is not set
# CONFIG_NET_TEAM is not set
# CONFIG_MACVLAN is not set
# CONFIG_IPVLAN is not set
# CONFIG_VXLAN is not set
# CONFIG_GENEVE is not set
# CONFIG_BAREUDP is not set
# CONFIG_GTP is not set
# CONFIG_MACSEC is not set
CONFIG_NETCONSOLE=m
CONFIG_NETCONSOLE_DYNAMIC=y
CONFIG_NETPOLL=y
CONFIG_NET_POLL_CONTROLLER=y
CONFIG_TUN=m
# CONFIG_TUN_VNET_CROSS_LE is not set
CONFIG_VETH=m
CONFIG_VIRTIO_NET=m
# CONFIG_NLMON is not set
# CONFIG_NET_VRF is not set
# CONFIG_VSOCKMON is not set
# CONFIG_ARCNET is not set
CONFIG_ATM_DRIVERS=y
# CONFIG_ATM_DUMMY is not set
# CONFIG_ATM_TCP is not set
# CONFIG_ATM_LANAI is not set
# CONFIG_ATM_ENI is not set
# CONFIG_ATM_FIRESTREAM is not set
# CONFIG_ATM_ZATM is not set
# CONFIG_ATM_NICSTAR is not set
# CONFIG_ATM_IDT77252 is not set
# CONFIG_ATM_AMBASSADOR is not set
# CONFIG_ATM_HORIZON is not set
# CONFIG_ATM_IA is not set
# CONFIG_ATM_FORE200E is not set
# CONFIG_ATM_HE is not set
# CONFIG_ATM_SOLOS is not set

#
# Distributed Switch Architecture drivers
#
# CONFIG_NET_DSA_MV88E6XXX_PTP is not set
# end of Distributed Switch Architecture drivers

CONFIG_ETHERNET=y
CONFIG_MDIO=y
CONFIG_NET_VENDOR_3COM=y
# CONFIG_VORTEX is not set
# CONFIG_TYPHOON is not set
CONFIG_NET_VENDOR_ADAPTEC=y
# CONFIG_ADAPTEC_STARFIRE is not set
CONFIG_NET_VENDOR_AGERE=y
# CONFIG_ET131X is not set
CONFIG_NET_VENDOR_ALACRITECH=y
# CONFIG_SLICOSS is not set
CONFIG_NET_VENDOR_ALTEON=y
# CONFIG_ACENIC is not set
# CONFIG_ALTERA_TSE is not set
CONFIG_NET_VENDOR_AMAZON=y
# CONFIG_ENA_ETHERNET is not set
CONFIG_NET_VENDOR_AMD=y
# CONFIG_AMD8111_ETH is not set
# CONFIG_PCNET32 is not set
# CONFIG_AMD_XGBE is not set
CONFIG_NET_VENDOR_AQUANTIA=y
# CONFIG_AQTION is not set
CONFIG_NET_VENDOR_ARC=y
CONFIG_NET_VENDOR_ATHEROS=y
# CONFIG_ATL2 is not set
# CONFIG_ATL1 is not set
# CONFIG_ATL1E is not set
# CONFIG_ATL1C is not set
# CONFIG_ALX is not set
CONFIG_NET_VENDOR_BROADCOM=y
# CONFIG_B44 is not set
# CONFIG_BCMGENET is not set
# CONFIG_BNX2 is not set
# CONFIG_CNIC is not set
# CONFIG_TIGON3 is not set
# CONFIG_BNX2X is not set
# CONFIG_SYSTEMPORT is not set
# CONFIG_BNXT is not set
CONFIG_NET_VENDOR_BROCADE=y
# CONFIG_BNA is not set
CONFIG_NET_VENDOR_CADENCE=y
# CONFIG_MACB is not set
CONFIG_NET_VENDOR_CAVIUM=y
# CONFIG_THUNDER_NIC_PF is not set
# CONFIG_THUNDER_NIC_VF is not set
# CONFIG_THUNDER_NIC_BGX is not set
# CONFIG_THUNDER_NIC_RGX is not set
CONFIG_CAVIUM_PTP=y
# CONFIG_LIQUIDIO is not set
# CONFIG_LIQUIDIO_VF is not set
CONFIG_NET_VENDOR_CHELSIO=y
# CONFIG_CHELSIO_T1 is not set
# CONFIG_CHELSIO_T3 is not set
# CONFIG_CHELSIO_T4 is not set
# CONFIG_CHELSIO_T4VF is not set
CONFIG_NET_VENDOR_CISCO=y
# CONFIG_ENIC is not set
CONFIG_NET_VENDOR_CORTINA=y
# CONFIG_CX_ECAT is not set
# CONFIG_DNET is not set
CONFIG_NET_VENDOR_DEC=y
# CONFIG_NET_TULIP is not set
CONFIG_NET_VENDOR_DLINK=y
# CONFIG_DL2K is not set
# CONFIG_SUNDANCE is not set
CONFIG_NET_VENDOR_EMULEX=y
# CONFIG_BE2NET is not set
CONFIG_NET_VENDOR_EZCHIP=y
CONFIG_NET_VENDOR_GOOGLE=y
# CONFIG_GVE is not set
CONFIG_NET_VENDOR_HUAWEI=y
# CONFIG_HINIC is not set
CONFIG_NET_VENDOR_I825XX=y
CONFIG_NET_VENDOR_INTEL=y
# CONFIG_E100 is not set
CONFIG_E1000=y
CONFIG_E1000E=y
CONFIG_E1000E_HWTS=y
CONFIG_IGB=y
CONFIG_IGB_HWMON=y
# CONFIG_IGBVF is not set
# CONFIG_IXGB is not set
CONFIG_IXGBE=y
CONFIG_IXGBE_HWMON=y
# CONFIG_IXGBE_DCB is not set
CONFIG_IXGBE_IPSEC=y
# CONFIG_IXGBEVF is not set
CONFIG_I40E=y
# CONFIG_I40E_DCB is not set
# CONFIG_I40EVF is not set
# CONFIG_ICE is not set
# CONFIG_FM10K is not set
# CONFIG_IGC is not set
# CONFIG_JME is not set
CONFIG_NET_VENDOR_MARVELL=y
# CONFIG_MVMDIO is not set
# CONFIG_SKGE is not set
# CONFIG_SKY2 is not set
# CONFIG_PRESTERA is not set
CONFIG_NET_VENDOR_MELLANOX=y
# CONFIG_MLX4_EN is not set
# CONFIG_MLX5_CORE is not set
# CONFIG_MLXSW_CORE is not set
# CONFIG_MLXFW is not set
CONFIG_NET_VENDOR_MICREL=y
# CONFIG_KS8842 is not set
# CONFIG_KS8851 is not set
# CONFIG_KS8851_MLL is not set
# CONFIG_KSZ884X_PCI is not set
CONFIG_NET_VENDOR_MICROCHIP=y
# CONFIG_ENC28J60 is not set
# CONFIG_ENCX24J600 is not set
# CONFIG_LAN743X is not set
CONFIG_NET_VENDOR_MICROSEMI=y
CONFIG_NET_VENDOR_MYRI=y
# CONFIG_MYRI10GE is not set
# CONFIG_FEALNX is not set
CONFIG_NET_VENDOR_NATSEMI=y
# CONFIG_NATSEMI is not set
# CONFIG_NS83820 is not set
CONFIG_NET_VENDOR_NETERION=y
# CONFIG_S2IO is not set
# CONFIG_VXGE is not set
CONFIG_NET_VENDOR_NETRONOME=y
# CONFIG_NFP is not set
CONFIG_NET_VENDOR_NI=y
# CONFIG_NI_XGE_MANAGEMENT_ENET is not set
CONFIG_NET_VENDOR_8390=y
# CONFIG_NE2K_PCI is not set
CONFIG_NET_VENDOR_NVIDIA=y
# CONFIG_FORCEDETH is not set
CONFIG_NET_VENDOR_OKI=y
# CONFIG_ETHOC is not set
CONFIG_NET_VENDOR_PACKET_ENGINES=y
# CONFIG_HAMACHI is not set
# CONFIG_YELLOWFIN is not set
CONFIG_NET_VENDOR_PENSANDO=y
# CONFIG_IONIC is not set
CONFIG_NET_VENDOR_QLOGIC=y
# CONFIG_QLA3XXX is not set
# CONFIG_QLCNIC is not set
# CONFIG_NETXEN_NIC is not set
# CONFIG_QED is not set
CONFIG_NET_VENDOR_QUALCOMM=y
# CONFIG_QCOM_EMAC is not set
# CONFIG_RMNET is not set
CONFIG_NET_VENDOR_RDC=y
# CONFIG_R6040 is not set
CONFIG_NET_VENDOR_REALTEK=y
# CONFIG_ATP is not set
# CONFIG_8139CP is not set
# CONFIG_8139TOO is not set
CONFIG_R8169=y
CONFIG_NET_VENDOR_RENESAS=y
CONFIG_NET_VENDOR_ROCKER=y
# CONFIG_ROCKER is not set
CONFIG_NET_VENDOR_SAMSUNG=y
# CONFIG_SXGBE_ETH is not set
CONFIG_NET_VENDOR_SEEQ=y
CONFIG_NET_VENDOR_SOLARFLARE=y
# CONFIG_SFC is not set
# CONFIG_SFC_FALCON is not set
CONFIG_NET_VENDOR_SILAN=y
# CONFIG_SC92031 is not set
CONFIG_NET_VENDOR_SIS=y
# CONFIG_SIS900 is not set
# CONFIG_SIS190 is not set
CONFIG_NET_VENDOR_SMSC=y
# CONFIG_EPIC100 is not set
# CONFIG_SMSC911X is not set
# CONFIG_SMSC9420 is not set
CONFIG_NET_VENDOR_SOCIONEXT=y
CONFIG_NET_VENDOR_STMICRO=y
# CONFIG_STMMAC_ETH is not set
CONFIG_NET_VENDOR_SUN=y
# CONFIG_HAPPYMEAL is not set
# CONFIG_SUNGEM is not set
# CONFIG_CASSINI is not set
# CONFIG_NIU is not set
CONFIG_NET_VENDOR_SYNOPSYS=y
# CONFIG_DWC_XLGMAC is not set
CONFIG_NET_VENDOR_TEHUTI=y
# CONFIG_TEHUTI is not set
CONFIG_NET_VENDOR_TI=y
# CONFIG_TI_CPSW_PHY_SEL is not set
# CONFIG_TLAN is not set
CONFIG_NET_VENDOR_VIA=y
# CONFIG_VIA_RHINE is not set
# CONFIG_VIA_VELOCITY is not set
CONFIG_NET_VENDOR_WIZNET=y
# CONFIG_WIZNET_W5100 is not set
# CONFIG_WIZNET_W5300 is not set
CONFIG_NET_VENDOR_XILINX=y
# CONFIG_XILINX_EMACLITE is not set
# CONFIG_XILINX_AXI_EMAC is not set
# CONFIG_XILINX_LL_TEMAC is not set
# CONFIG_FDDI is not set
# CONFIG_HIPPI is not set
# CONFIG_NET_SB1000 is not set
CONFIG_PHYLIB=y
# CONFIG_LED_TRIGGER_PHY is not set
# CONFIG_FIXED_PHY is not set

#
# MII PHY device drivers
#
# CONFIG_AMD_PHY is not set
# CONFIG_ADIN_PHY is not set
# CONFIG_AQUANTIA_PHY is not set
# CONFIG_AX88796B_PHY is not set
# CONFIG_BROADCOM_PHY is not set
# CONFIG_BCM54140_PHY is not set
# CONFIG_BCM7XXX_PHY is not set
# CONFIG_BCM84881_PHY is not set
# CONFIG_BCM87XX_PHY is not set
# CONFIG_CICADA_PHY is not set
# CONFIG_CORTINA_PHY is not set
# CONFIG_DAVICOM_PHY is not set
# CONFIG_ICPLUS_PHY is not set
# CONFIG_LXT_PHY is not set
# CONFIG_INTEL_XWAY_PHY is not set
# CONFIG_LSI_ET1011C_PHY is not set
# CONFIG_MARVELL_PHY is not set
# CONFIG_MARVELL_10G_PHY is not set
# CONFIG_MICREL_PHY is not set
# CONFIG_MICROCHIP_PHY is not set
# CONFIG_MICROCHIP_T1_PHY is not set
# CONFIG_MICROSEMI_PHY is not set
# CONFIG_NATIONAL_PHY is not set
# CONFIG_NXP_TJA11XX_PHY is not set
# CONFIG_QSEMI_PHY is not set
CONFIG_REALTEK_PHY=y
# CONFIG_RENESAS_PHY is not set
# CONFIG_ROCKCHIP_PHY is not set
# CONFIG_SMSC_PHY is not set
# CONFIG_STE10XP is not set
# CONFIG_TERANETICS_PHY is not set
# CONFIG_DP83822_PHY is not set
# CONFIG_DP83TC811_PHY is not set
# CONFIG_DP83848_PHY is not set
# CONFIG_DP83867_PHY is not set
# CONFIG_DP83869_PHY is not set
# CONFIG_VITESSE_PHY is not set
# CONFIG_XILINX_GMII2RGMII is not set
# CONFIG_MICREL_KS8995MA is not set
CONFIG_MDIO_DEVICE=y
CONFIG_MDIO_BUS=y
CONFIG_MDIO_DEVRES=y
# CONFIG_MDIO_BITBANG is not set
# CONFIG_MDIO_BCM_UNIMAC is not set
# CONFIG_MDIO_MVUSB is not set
# CONFIG_MDIO_MSCC_MIIM is not set
# CONFIG_MDIO_THUNDER is not set

#
# MDIO Multiplexers
#

#
# PCS device drivers
#
# CONFIG_PCS_XPCS is not set
# end of PCS device drivers

# CONFIG_PLIP is not set
# CONFIG_PPP is not set
# CONFIG_SLIP is not set
CONFIG_USB_NET_DRIVERS=y
# CONFIG_USB_CATC is not set
# CONFIG_USB_KAWETH is not set
# CONFIG_USB_PEGASUS is not set
# CONFIG_USB_RTL8150 is not set
CONFIG_USB_RTL8152=y
# CONFIG_USB_LAN78XX is not set
CONFIG_USB_USBNET=y
CONFIG_USB_NET_AX8817X=y
CONFIG_USB_NET_AX88179_178A=y
# CONFIG_USB_NET_CDCETHER is not set
# CONFIG_USB_NET_CDC_EEM is not set
# CONFIG_USB_NET_CDC_NCM is not set
# CONFIG_USB_NET_HUAWEI_CDC_NCM is not set
# CONFIG_USB_NET_CDC_MBIM is not set
# CONFIG_USB_NET_DM9601 is not set
# CONFIG_USB_NET_SR9700 is not set
# CONFIG_USB_NET_SR9800 is not set
# CONFIG_USB_NET_SMSC75XX is not set
# CONFIG_USB_NET_SMSC95XX is not set
# CONFIG_USB_NET_GL620A is not set
# CONFIG_USB_NET_NET1080 is not set
# CONFIG_USB_NET_PLUSB is not set
# CONFIG_USB_NET_MCS7830 is not set
# CONFIG_USB_NET_RNDIS_HOST is not set
# CONFIG_USB_NET_CDC_SUBSET is not set
# CONFIG_USB_NET_ZAURUS is not set
# CONFIG_USB_NET_CX82310_ETH is not set
# CONFIG_USB_NET_KALMIA is not set
# CONFIG_USB_NET_QMI_WWAN is not set
# CONFIG_USB_HSO is not set
# CONFIG_USB_NET_INT51X1 is not set
# CONFIG_USB_IPHETH is not set
# CONFIG_USB_SIERRA_NET is not set
# CONFIG_USB_NET_CH9200 is not set
# CONFIG_USB_NET_AQC111 is not set
CONFIG_WLAN=y
CONFIG_WLAN_VENDOR_ADMTEK=y
# CONFIG_ADM8211 is not set
CONFIG_WLAN_VENDOR_ATH=y
# CONFIG_ATH_DEBUG is not set
# CONFIG_ATH5K is not set
# CONFIG_ATH5K_PCI is not set
# CONFIG_ATH9K is not set
# CONFIG_ATH9K_HTC is not set
# CONFIG_CARL9170 is not set
# CONFIG_ATH6KL is not set
# CONFIG_AR5523 is not set
# CONFIG_WIL6210 is not set
# CONFIG_ATH10K is not set
# CONFIG_WCN36XX is not set
# CONFIG_ATH11K is not set
CONFIG_WLAN_VENDOR_ATMEL=y
# CONFIG_ATMEL is not set
# CONFIG_AT76C50X_USB is not set
CONFIG_WLAN_VENDOR_BROADCOM=y
# CONFIG_B43 is not set
# CONFIG_B43LEGACY is not set
# CONFIG_BRCMSMAC is not set
# CONFIG_BRCMFMAC is not set
CONFIG_WLAN_VENDOR_CISCO=y
# CONFIG_AIRO is not set
CONFIG_WLAN_VENDOR_INTEL=y
# CONFIG_IPW2100 is not set
# CONFIG_IPW2200 is not set
# CONFIG_IWL4965 is not set
# CONFIG_IWL3945 is not set
# CONFIG_IWLWIFI is not set
CONFIG_WLAN_VENDOR_INTERSIL=y
# CONFIG_HOSTAP is not set
# CONFIG_HERMES is not set
# CONFIG_P54_COMMON is not set
# CONFIG_PRISM54 is not set
CONFIG_WLAN_VENDOR_MARVELL=y
# CONFIG_LIBERTAS is not set
# CONFIG_LIBERTAS_THINFIRM is not set
# CONFIG_MWIFIEX is not set
# CONFIG_MWL8K is not set
CONFIG_WLAN_VENDOR_MEDIATEK=y
# CONFIG_MT7601U is not set
# CONFIG_MT76x0U is not set
# CONFIG_MT76x0E is not set
# CONFIG_MT76x2E is not set
# CONFIG_MT76x2U is not set
# CONFIG_MT7603E is not set
# CONFIG_MT7615E is not set
# CONFIG_MT7663U is not set
# CONFIG_MT7663S is not set
# CONFIG_MT7915E is not set
# CONFIG_MT7921E is not set
CONFIG_WLAN_VENDOR_MICROCHIP=y
# CONFIG_WILC1000_SDIO is not set
# CONFIG_WILC1000_SPI is not set
CONFIG_WLAN_VENDOR_RALINK=y
# CONFIG_RT2X00 is not set
CONFIG_WLAN_VENDOR_REALTEK=y
# CONFIG_RTL8180 is not set
# CONFIG_RTL8187 is not set
CONFIG_RTL_CARDS=m
# CONFIG_RTL8192CE is not set
# CONFIG_RTL8192SE is not set
# CONFIG_RTL8192DE is not set
# CONFIG_RTL8723AE is not set
# CONFIG_RTL8723BE is not set
# CONFIG_RTL8188EE is not set
# CONFIG_RTL8192EE is not set
# CONFIG_RTL8821AE is not set
# CONFIG_RTL8192CU is not set
# CONFIG_RTL8XXXU is not set
# CONFIG_RTW88 is not set
CONFIG_WLAN_VENDOR_RSI=y
# CONFIG_RSI_91X is not set
CONFIG_WLAN_VENDOR_ST=y
# CONFIG_CW1200 is not set
CONFIG_WLAN_VENDOR_TI=y
# CONFIG_WL1251 is not set
# CONFIG_WL12XX is not set
# CONFIG_WL18XX is not set
# CONFIG_WLCORE is not set
CONFIG_WLAN_VENDOR_ZYDAS=y
# CONFIG_USB_ZD1201 is not set
# CONFIG_ZD1211RW is not set
CONFIG_WLAN_VENDOR_QUANTENNA=y
# CONFIG_QTNFMAC_PCIE is not set
CONFIG_MAC80211_HWSIM=m
# CONFIG_USB_NET_RNDIS_WLAN is not set
# CONFIG_VIRT_WIFI is not set
# CONFIG_WAN is not set
CONFIG_IEEE802154_DRIVERS=m
# CONFIG_IEEE802154_FAKELB is not set
# CONFIG_IEEE802154_AT86RF230 is not set
# CONFIG_IEEE802154_MRF24J40 is not set
# CONFIG_IEEE802154_CC2520 is not set
# CONFIG_IEEE802154_ATUSB is not set
# CONFIG_IEEE802154_ADF7242 is not set
# CONFIG_IEEE802154_CA8210 is not set
# CONFIG_IEEE802154_MCR20A is not set
# CONFIG_IEEE802154_HWSIM is not set
CONFIG_XEN_NETDEV_FRONTEND=y
# CONFIG_VMXNET3 is not set
# CONFIG_FUJITSU_ES is not set
# CONFIG_HYPERV_NET is not set
CONFIG_NETDEVSIM=m
CONFIG_NET_FAILOVER=m
# CONFIG_ISDN is not set
# CONFIG_NVM is not set

#
# Input device support
#
CONFIG_INPUT=y
CONFIG_INPUT_LEDS=y
CONFIG_INPUT_FF_MEMLESS=m
CONFIG_INPUT_SPARSEKMAP=m
# CONFIG_INPUT_MATRIXKMAP is not set

#
# Userland interfaces
#
CONFIG_INPUT_MOUSEDEV=y
# CONFIG_INPUT_MOUSEDEV_PSAUX is not set
CONFIG_INPUT_MOUSEDEV_SCREEN_X=1024
CONFIG_INPUT_MOUSEDEV_SCREEN_Y=768
CONFIG_INPUT_JOYDEV=m
CONFIG_INPUT_EVDEV=y
# CONFIG_INPUT_EVBUG is not set

#
# Input Device Drivers
#
CONFIG_INPUT_KEYBOARD=y
# CONFIG_KEYBOARD_ADP5588 is not set
# CONFIG_KEYBOARD_ADP5589 is not set
# CONFIG_KEYBOARD_APPLESPI is not set
CONFIG_KEYBOARD_ATKBD=y
# CONFIG_KEYBOARD_QT1050 is not set
# CONFIG_KEYBOARD_QT1070 is not set
# CONFIG_KEYBOARD_QT2160 is not set
# CONFIG_KEYBOARD_DLINK_DIR685 is not set
# CONFIG_KEYBOARD_LKKBD is not set
# CONFIG_KEYBOARD_GPIO is not set
# CONFIG_KEYBOARD_GPIO_POLLED is not set
# CONFIG_KEYBOARD_TCA6416 is not set
# CONFIG_KEYBOARD_TCA8418 is not set
# CONFIG_KEYBOARD_MATRIX is not set
# CONFIG_KEYBOARD_LM8323 is not set
# CONFIG_KEYBOARD_LM8333 is not set
# CONFIG_KEYBOARD_MAX7359 is not set
# CONFIG_KEYBOARD_MCS is not set
# CONFIG_KEYBOARD_MPR121 is not set
# CONFIG_KEYBOARD_NEWTON is not set
# CONFIG_KEYBOARD_OPENCORES is not set
# CONFIG_KEYBOARD_SAMSUNG is not set
# CONFIG_KEYBOARD_STOWAWAY is not set
# CONFIG_KEYBOARD_SUNKBD is not set
# CONFIG_KEYBOARD_TM2_TOUCHKEY is not set
# CONFIG_KEYBOARD_XTKBD is not set
CONFIG_INPUT_MOUSE=y
CONFIG_MOUSE_PS2=y
CONFIG_MOUSE_PS2_ALPS=y
CONFIG_MOUSE_PS2_BYD=y
CONFIG_MOUSE_PS2_LOGIPS2PP=y
CONFIG_MOUSE_PS2_SYNAPTICS=y
CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS=y
CONFIG_MOUSE_PS2_CYPRESS=y
CONFIG_MOUSE_PS2_LIFEBOOK=y
CONFIG_MOUSE_PS2_TRACKPOINT=y
CONFIG_MOUSE_PS2_ELANTECH=y
CONFIG_MOUSE_PS2_ELANTECH_SMBUS=y
CONFIG_MOUSE_PS2_SENTELIC=y
# CONFIG_MOUSE_PS2_TOUCHKIT is not set
CONFIG_MOUSE_PS2_FOCALTECH=y
CONFIG_MOUSE_PS2_VMMOUSE=y
CONFIG_MOUSE_PS2_SMBUS=y
CONFIG_MOUSE_SERIAL=m
# CONFIG_MOUSE_APPLETOUCH is not set
# CONFIG_MOUSE_BCM5974 is not set
CONFIG_MOUSE_CYAPA=m
CONFIG_MOUSE_ELAN_I2C=m
CONFIG_MOUSE_ELAN_I2C_I2C=y
CONFIG_MOUSE_ELAN_I2C_SMBUS=y
CONFIG_MOUSE_VSXXXAA=m
# CONFIG_MOUSE_GPIO is not set
CONFIG_MOUSE_SYNAPTICS_I2C=m
# CONFIG_MOUSE_SYNAPTICS_USB is not set
# CONFIG_INPUT_JOYSTICK is not set
# CONFIG_INPUT_TABLET is not set
# CONFIG_INPUT_TOUCHSCREEN is not set
# CONFIG_INPUT_MISC is not set
CONFIG_RMI4_CORE=m
CONFIG_RMI4_I2C=m
CONFIG_RMI4_SPI=m
CONFIG_RMI4_SMB=m
CONFIG_RMI4_F03=y
CONFIG_RMI4_F03_SERIO=m
CONFIG_RMI4_2D_SENSOR=y
CONFIG_RMI4_F11=y
CONFIG_RMI4_F12=y
CONFIG_RMI4_F30=y
CONFIG_RMI4_F34=y
# CONFIG_RMI4_F3A is not set
# CONFIG_RMI4_F54 is not set
CONFIG_RMI4_F55=y

#
# Hardware I/O ports
#
CONFIG_SERIO=y
CONFIG_ARCH_MIGHT_HAVE_PC_SERIO=y
CONFIG_SERIO_I8042=y
CONFIG_SERIO_SERPORT=y
# CONFIG_SERIO_CT82C710 is not set
# CONFIG_SERIO_PARKBD is not set
# CONFIG_SERIO_PCIPS2 is not set
CONFIG_SERIO_LIBPS2=y
CONFIG_SERIO_RAW=m
CONFIG_SERIO_ALTERA_PS2=m
# CONFIG_SERIO_PS2MULT is not set
CONFIG_SERIO_ARC_PS2=m
CONFIG_HYPERV_KEYBOARD=m
# CONFIG_SERIO_GPIO_PS2 is not set
# CONFIG_USERIO is not set
# CONFIG_GAMEPORT is not set
# end of Hardware I/O ports
# end of Input device support

#
# Character devices
#
CONFIG_TTY=y
CONFIG_VT=y
CONFIG_CONSOLE_TRANSLATIONS=y
CONFIG_VT_CONSOLE=y
CONFIG_VT_CONSOLE_SLEEP=y
CONFIG_HW_CONSOLE=y
CONFIG_VT_HW_CONSOLE_BINDING=y
CONFIG_UNIX98_PTYS=y
# CONFIG_LEGACY_PTYS is not set
CONFIG_LDISC_AUTOLOAD=y

#
# Serial drivers
#
CONFIG_SERIAL_EARLYCON=y
CONFIG_SERIAL_8250=y
# CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set
CONFIG_SERIAL_8250_PNP=y
# CONFIG_SERIAL_8250_16550A_VARIANTS is not set
# CONFIG_SERIAL_8250_FINTEK is not set
CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_8250_DMA=y
CONFIG_SERIAL_8250_PCI=y
CONFIG_SERIAL_8250_EXAR=y
CONFIG_SERIAL_8250_NR_UARTS=64
CONFIG_SERIAL_8250_RUNTIME_UARTS=4
CONFIG_SERIAL_8250_EXTENDED=y
CONFIG_SERIAL_8250_MANY_PORTS=y
CONFIG_SERIAL_8250_SHARE_IRQ=y
# CONFIG_SERIAL_8250_DETECT_IRQ is not set
CONFIG_SERIAL_8250_RSA=y
CONFIG_SERIAL_8250_DWLIB=y
CONFIG_SERIAL_8250_DW=y
# CONFIG_SERIAL_8250_RT288X is not set
CONFIG_SERIAL_8250_LPSS=y
CONFIG_SERIAL_8250_MID=y

#
# Non-8250 serial port support
#
# CONFIG_SERIAL_MAX3100 is not set
# CONFIG_SERIAL_MAX310X is not set
# CONFIG_SERIAL_UARTLITE is not set
CONFIG_SERIAL_CORE=y
CONFIG_SERIAL_CORE_CONSOLE=y
CONFIG_SERIAL_JSM=m
# CONFIG_SERIAL_LANTIQ is not set
# CONFIG_SERIAL_SCCNXP is not set
# CONFIG_SERIAL_SC16IS7XX is not set
# CONFIG_SERIAL_BCM63XX is not set
# CONFIG_SERIAL_ALTERA_JTAGUART is not set
# CONFIG_SERIAL_ALTERA_UART is not set
CONFIG_SERIAL_ARC=m
CONFIG_SERIAL_ARC_NR_PORTS=1
# CONFIG_SERIAL_RP2 is not set
# CONFIG_SERIAL_FSL_LPUART is not set
# CONFIG_SERIAL_FSL_LINFLEXUART is not set
# CONFIG_SERIAL_SPRD is not set
# end of Serial drivers

CONFIG_SERIAL_MCTRL_GPIO=y
CONFIG_SERIAL_NONSTANDARD=y
# CONFIG_ROCKETPORT is not set
CONFIG_CYCLADES=m
# CONFIG_CYZ_INTR is not set
# CONFIG_MOXA_INTELLIO is not set
# CONFIG_MOXA_SMARTIO is not set
CONFIG_SYNCLINK_GT=m
# CONFIG_ISI is not set
CONFIG_N_HDLC=m
CONFIG_N_GSM=m
CONFIG_NOZOMI=m
# CONFIG_NULL_TTY is not set
# CONFIG_TRACE_SINK is not set
CONFIG_HVC_DRIVER=y
CONFIG_HVC_IRQ=y
CONFIG_HVC_XEN=y
CONFIG_HVC_XEN_FRONTEND=y
# CONFIG_SERIAL_DEV_BUS is not set
CONFIG_PRINTER=m
# CONFIG_LP_CONSOLE is not set
CONFIG_PPDEV=m
CONFIG_VIRTIO_CONSOLE=m
CONFIG_IPMI_HANDLER=m
CONFIG_IPMI_DMI_DECODE=y
CONFIG_IPMI_PLAT_DATA=y
CONFIG_IPMI_PANIC_EVENT=y
CONFIG_IPMI_PANIC_STRING=y
CONFIG_IPMI_DEVICE_INTERFACE=m
CONFIG_IPMI_SI=m
CONFIG_IPMI_SSIF=m
CONFIG_IPMI_WATCHDOG=m
CONFIG_IPMI_POWEROFF=m
CONFIG_HW_RANDOM=y
CONFIG_HW_RANDOM_TIMERIOMEM=m
CONFIG_HW_RANDOM_INTEL=m
CONFIG_HW_RANDOM_AMD=m
# CONFIG_HW_RANDOM_BA431 is not set
CONFIG_HW_RANDOM_VIA=m
CONFIG_HW_RANDOM_VIRTIO=y
# CONFIG_HW_RANDOM_XIPHERA is not set
# CONFIG_APPLICOM is not set
# CONFIG_MWAVE is not set
CONFIG_DEVMEM=y
# CONFIG_DEVKMEM is not set
CONFIG_NVRAM=y
CONFIG_RAW_DRIVER=y
CONFIG_MAX_RAW_DEVS=8192
CONFIG_DEVPORT=y
CONFIG_HPET=y
CONFIG_HPET_MMAP=y
# CONFIG_HPET_MMAP_DEFAULT is not set
CONFIG_HANGCHECK_TIMER=m
CONFIG_UV_MMTIMER=m
CONFIG_TCG_TPM=y
CONFIG_HW_RANDOM_TPM=y
CONFIG_TCG_TIS_CORE=y
CONFIG_TCG_TIS=y
# CONFIG_TCG_TIS_SPI is not set
# CONFIG_TCG_TIS_I2C_CR50 is not set
CONFIG_TCG_TIS_I2C_ATMEL=m
CONFIG_TCG_TIS_I2C_INFINEON=m
CONFIG_TCG_TIS_I2C_NUVOTON=m
CONFIG_TCG_NSC=m
CONFIG_TCG_ATMEL=m
CONFIG_TCG_INFINEON=m
# CONFIG_TCG_XEN is not set
CONFIG_TCG_CRB=y
# CONFIG_TCG_VTPM_PROXY is not set
CONFIG_TCG_TIS_ST33ZP24=m
CONFIG_TCG_TIS_ST33ZP24_I2C=m
# CONFIG_TCG_TIS_ST33ZP24_SPI is not set
CONFIG_TELCLOCK=m
# CONFIG_XILLYBUS is not set
# end of Character devices

# CONFIG_RANDOM_TRUST_CPU is not set
# CONFIG_RANDOM_TRUST_BOOTLOADER is not set

#
# I2C support
#
CONFIG_I2C=y
CONFIG_ACPI_I2C_OPREGION=y
CONFIG_I2C_BOARDINFO=y
CONFIG_I2C_COMPAT=y
CONFIG_I2C_CHARDEV=m
CONFIG_I2C_MUX=m

#
# Multiplexer I2C Chip support
#
# CONFIG_I2C_MUX_GPIO is not set
# CONFIG_I2C_MUX_LTC4306 is not set
# CONFIG_I2C_MUX_PCA9541 is not set
# CONFIG_I2C_MUX_PCA954x is not set
# CONFIG_I2C_MUX_REG is not set
CONFIG_I2C_MUX_MLXCPLD=m
# end of Multiplexer I2C Chip support

CONFIG_I2C_HELPER_AUTO=y
CONFIG_I2C_SMBUS=y
CONFIG_I2C_ALGOBIT=y
CONFIG_I2C_ALGOPCA=m

#
# I2C Hardware Bus support
#

#
# PC SMBus host controller drivers
#
# CONFIG_I2C_ALI1535 is not set
# CONFIG_I2C_ALI1563 is not set
# CONFIG_I2C_ALI15X3 is not set
CONFIG_I2C_AMD756=m
CONFIG_I2C_AMD756_S4882=m
CONFIG_I2C_AMD8111=m
# CONFIG_I2C_AMD_MP2 is not set
CONFIG_I2C_I801=y
CONFIG_I2C_ISCH=m
CONFIG_I2C_ISMT=m
CONFIG_I2C_PIIX4=m
CONFIG_I2C_NFORCE2=m
CONFIG_I2C_NFORCE2_S4985=m
# CONFIG_I2C_NVIDIA_GPU is not set
# CONFIG_I2C_SIS5595 is not set
# CONFIG_I2C_SIS630 is not set
CONFIG_I2C_SIS96X=m
CONFIG_I2C_VIA=m
CONFIG_I2C_VIAPRO=m

#
# ACPI drivers
#
CONFIG_I2C_SCMI=m

#
# I2C system bus drivers (mostly embedded / system-on-chip)
#
# CONFIG_I2C_CBUS_GPIO is not set
CONFIG_I2C_DESIGNWARE_CORE=m
# CONFIG_I2C_DESIGNWARE_SLAVE is not set
CONFIG_I2C_DESIGNWARE_PLATFORM=m
CONFIG_I2C_DESIGNWARE_BAYTRAIL=y
# CONFIG_I2C_DESIGNWARE_PCI is not set
# CONFIG_I2C_EMEV2 is not set
# CONFIG_I2C_GPIO is not set
# CONFIG_I2C_OCORES is not set
CONFIG_I2C_PCA_PLATFORM=m
CONFIG_I2C_SIMTEC=m
# CONFIG_I2C_XILINX is not set

#
# External I2C/SMBus adapter drivers
#
# CONFIG_I2C_DIOLAN_U2C is not set
CONFIG_I2C_PARPORT=m
# CONFIG_I2C_ROBOTFUZZ_OSIF is not set
# CONFIG_I2C_TAOS_EVM is not set
# CONFIG_I2C_TINY_USB is not set

#
# Other I2C/SMBus bus drivers
#
CONFIG_I2C_MLXCPLD=m
# end of I2C Hardware Bus support

CONFIG_I2C_STUB=m
# CONFIG_I2C_SLAVE is not set
# CONFIG_I2C_DEBUG_CORE is not set
# CONFIG_I2C_DEBUG_ALGO is not set
# CONFIG_I2C_DEBUG_BUS is not set
# end of I2C support

# CONFIG_I3C is not set
CONFIG_SPI=y
# CONFIG_SPI_DEBUG is not set
CONFIG_SPI_MASTER=y
# CONFIG_SPI_MEM is not set

#
# SPI Master Controller Drivers
#
# CONFIG_SPI_ALTERA is not set
# CONFIG_SPI_AXI_SPI_ENGINE is not set
# CONFIG_SPI_BITBANG is not set
# CONFIG_SPI_BUTTERFLY is not set
# CONFIG_SPI_CADENCE is not set
# CONFIG_SPI_DESIGNWARE is not set
# CONFIG_SPI_NXP_FLEXSPI is not set
# CONFIG_SPI_GPIO is not set
# CONFIG_SPI_LM70_LLP is not set
# CONFIG_SPI_LANTIQ_SSC is not set
# CONFIG_SPI_OC_TINY is not set
# CONFIG_SPI_PXA2XX is not set
# CONFIG_SPI_ROCKCHIP is not set
# CONFIG_SPI_SC18IS602 is not set
# CONFIG_SPI_SIFIVE is not set
# CONFIG_SPI_MXIC is not set
# CONFIG_SPI_XCOMM is not set
# CONFIG_SPI_XILINX is not set
# CONFIG_SPI_ZYNQMP_GQSPI is not set
# CONFIG_SPI_AMD is not set

#
# SPI Multiplexer support
#
# CONFIG_SPI_MUX is not set

#
# SPI Protocol Masters
#
# CONFIG_SPI_SPIDEV is not set
# CONFIG_SPI_LOOPBACK_TEST is not set
# CONFIG_SPI_TLE62X0 is not set
# CONFIG_SPI_SLAVE is not set
CONFIG_SPI_DYNAMIC=y
# CONFIG_SPMI is not set
# CONFIG_HSI is not set
CONFIG_PPS=y
# CONFIG_PPS_DEBUG is not set

#
# PPS clients support
#
# CONFIG_PPS_CLIENT_KTIMER is not set
CONFIG_PPS_CLIENT_LDISC=m
CONFIG_PPS_CLIENT_PARPORT=m
CONFIG_PPS_CLIENT_GPIO=m

#
# PPS generators support
#

#
# PTP clock support
#
CONFIG_PTP_1588_CLOCK=y
# CONFIG_DP83640_PHY is not set
# CONFIG_PTP_1588_CLOCK_INES is not set
CONFIG_PTP_1588_CLOCK_KVM=m
# CONFIG_PTP_1588_CLOCK_IDT82P33 is not set
# CONFIG_PTP_1588_CLOCK_IDTCM is not set
# CONFIG_PTP_1588_CLOCK_VMW is not set
# CONFIG_PTP_1588_CLOCK_OCP is not set
# end of PTP clock support

CONFIG_PINCTRL=y
CONFIG_PINMUX=y
CONFIG_PINCONF=y
CONFIG_GENERIC_PINCONF=y
# CONFIG_DEBUG_PINCTRL is not set
CONFIG_PINCTRL_AMD=m
# CONFIG_PINCTRL_MCP23S08 is not set
# CONFIG_PINCTRL_SX150X is not set
CONFIG_PINCTRL_BAYTRAIL=y
# CONFIG_PINCTRL_CHERRYVIEW is not set
# CONFIG_PINCTRL_LYNXPOINT is not set
CONFIG_PINCTRL_INTEL=y
# CONFIG_PINCTRL_ALDERLAKE is not set
CONFIG_PINCTRL_BROXTON=m
CONFIG_PINCTRL_CANNONLAKE=m
CONFIG_PINCTRL_CEDARFORK=m
CONFIG_PINCTRL_DENVERTON=m
# CONFIG_PINCTRL_ELKHARTLAKE is not set
# CONFIG_PINCTRL_EMMITSBURG is not set
CONFIG_PINCTRL_GEMINILAKE=m
# CONFIG_PINCTRL_ICELAKE is not set
# CONFIG_PINCTRL_JASPERLAKE is not set
# CONFIG_PINCTRL_LAKEFIELD is not set
CONFIG_PINCTRL_LEWISBURG=m
CONFIG_PINCTRL_SUNRISEPOINT=m
# CONFIG_PINCTRL_TIGERLAKE is not set

#
# Renesas pinctrl drivers
#
# end of Renesas pinctrl drivers

CONFIG_GPIOLIB=y
CONFIG_GPIOLIB_FASTPATH_LIMIT=512
CONFIG_GPIO_ACPI=y
CONFIG_GPIOLIB_IRQCHIP=y
# CONFIG_DEBUG_GPIO is not set
CONFIG_GPIO_CDEV=y
CONFIG_GPIO_CDEV_V1=y
CONFIG_GPIO_GENERIC=m

#
# Memory mapped GPIO drivers
#
CONFIG_GPIO_AMDPT=m
# CONFIG_GPIO_DWAPB is not set
# CONFIG_GPIO_EXAR is not set
# CONFIG_GPIO_GENERIC_PLATFORM is not set
CONFIG_GPIO_ICH=m
# CONFIG_GPIO_MB86S7X is not set
# CONFIG_GPIO_VX855 is not set
# CONFIG_GPIO_AMD_FCH is not set
# end of Memory mapped GPIO drivers

#
# Port-mapped I/O GPIO drivers
#
# CONFIG_GPIO_F7188X is not set
# CONFIG_GPIO_IT87 is not set
# CONFIG_GPIO_SCH is not set
# CONFIG_GPIO_SCH311X is not set
# CONFIG_GPIO_WINBOND is not set
# CONFIG_GPIO_WS16C48 is not set
# end of Port-mapped I/O GPIO drivers

#
# I2C GPIO expanders
#
# CONFIG_GPIO_ADP5588 is not set
# CONFIG_GPIO_MAX7300 is not set
# CONFIG_GPIO_MAX732X is not set
# CONFIG_GPIO_PCA953X is not set
# CONFIG_GPIO_PCA9570 is not set
# CONFIG_GPIO_PCF857X is not set
# CONFIG_GPIO_TPIC2810 is not set
# end of I2C GPIO expanders

#
# MFD GPIO expanders
#
# end of MFD GPIO expanders

#
# PCI GPIO expanders
#
# CONFIG_GPIO_AMD8111 is not set
# CONFIG_GPIO_BT8XX is not set
# CONFIG_GPIO_ML_IOH is not set
# CONFIG_GPIO_PCI_IDIO_16 is not set
# CONFIG_GPIO_PCIE_IDIO_24 is not set
# CONFIG_GPIO_RDC321X is not set
# end of PCI GPIO expanders

#
# SPI GPIO expanders
#
# CONFIG_GPIO_MAX3191X is not set
# CONFIG_GPIO_MAX7301 is not set
# CONFIG_GPIO_MC33880 is not set
# CONFIG_GPIO_PISOSR is not set
# CONFIG_GPIO_XRA1403 is not set
# end of SPI GPIO expanders

#
# USB GPIO expanders
#
# end of USB GPIO expanders

#
# Virtual GPIO drivers
#
# CONFIG_GPIO_AGGREGATOR is not set
# CONFIG_GPIO_MOCKUP is not set
# end of Virtual GPIO drivers

# CONFIG_W1 is not set
CONFIG_POWER_RESET=y
# CONFIG_POWER_RESET_RESTART is not set
CONFIG_POWER_SUPPLY=y
# CONFIG_POWER_SUPPLY_DEBUG is not set
CONFIG_POWER_SUPPLY_HWMON=y
# CONFIG_PDA_POWER is not set
# CONFIG_TEST_POWER is not set
# CONFIG_CHARGER_ADP5061 is not set
# CONFIG_BATTERY_CW2015 is not set
# CONFIG_BATTERY_DS2780 is not set
# CONFIG_BATTERY_DS2781 is not set
# CONFIG_BATTERY_DS2782 is not set
# CONFIG_BATTERY_SBS is not set
# CONFIG_CHARGER_SBS is not set
# CONFIG_MANAGER_SBS is not set
# CONFIG_BATTERY_BQ27XXX is not set
# CONFIG_BATTERY_MAX17040 is not set
# CONFIG_BATTERY_MAX17042 is not set
# CONFIG_CHARGER_MAX8903 is not set
# CONFIG_CHARGER_LP8727 is not set
# CONFIG_CHARGER_GPIO is not set
# CONFIG_CHARGER_LT3651 is not set
# CONFIG_CHARGER_LTC4162L is not set
# CONFIG_CHARGER_BQ2415X is not set
# CONFIG_CHARGER_BQ24257 is not set
# CONFIG_CHARGER_BQ24735 is not set
# CONFIG_CHARGER_BQ2515X is not set
# CONFIG_CHARGER_BQ25890 is not set
# CONFIG_CHARGER_BQ25980 is not set
# CONFIG_CHARGER_BQ256XX is not set
CONFIG_CHARGER_SMB347=m
# CONFIG_BATTERY_GAUGE_LTC2941 is not set
# CONFIG_CHARGER_RT9455 is not set
# CONFIG_CHARGER_BD99954 is not set
CONFIG_HWMON=y
CONFIG_HWMON_VID=m
# CONFIG_HWMON_DEBUG_CHIP is not set

#
# Native drivers
#
CONFIG_SENSORS_ABITUGURU=m
CONFIG_SENSORS_ABITUGURU3=m
# CONFIG_SENSORS_AD7314 is not set
CONFIG_SENSORS_AD7414=m
CONFIG_SENSORS_AD7418=m
CONFIG_SENSORS_ADM1021=m
CONFIG_SENSORS_ADM1025=m
CONFIG_SENSORS_ADM1026=m
CONFIG_SENSORS_ADM1029=m
CONFIG_SENSORS_ADM1031=m
# CONFIG_SENSORS_ADM1177 is not set
CONFIG_SENSORS_ADM9240=m
CONFIG_SENSORS_ADT7X10=m
# CONFIG_SENSORS_ADT7310 is not set
CONFIG_SENSORS_ADT7410=m
CONFIG_SENSORS_ADT7411=m
CONFIG_SENSORS_ADT7462=m
CONFIG_SENSORS_ADT7470=m
CONFIG_SENSORS_ADT7475=m
# CONFIG_SENSORS_AHT10 is not set
# CONFIG_SENSORS_AS370 is not set
CONFIG_SENSORS_ASC7621=m
# CONFIG_SENSORS_AXI_FAN_CONTROL is not set
CONFIG_SENSORS_K8TEMP=m
CONFIG_SENSORS_K10TEMP=m
CONFIG_SENSORS_FAM15H_POWER=m
# CONFIG_SENSORS_AMD_ENERGY is not set
CONFIG_SENSORS_APPLESMC=m
CONFIG_SENSORS_ASB100=m
# CONFIG_SENSORS_ASPEED is not set
CONFIG_SENSORS_ATXP1=m
# CONFIG_SENSORS_CORSAIR_CPRO is not set
# CONFIG_SENSORS_CORSAIR_PSU is not set
# CONFIG_SENSORS_DRIVETEMP is not set
CONFIG_SENSORS_DS620=m
CONFIG_SENSORS_DS1621=m
CONFIG_SENSORS_DELL_SMM=m
CONFIG_SENSORS_I5K_AMB=m
CONFIG_SENSORS_F71805F=m
CONFIG_SENSORS_F71882FG=m
CONFIG_SENSORS_F75375S=m
CONFIG_SENSORS_FSCHMD=m
# CONFIG_SENSORS_FTSTEUTATES is not set
CONFIG_SENSORS_GL518SM=m
CONFIG_SENSORS_GL520SM=m
CONFIG_SENSORS_G760A=m
# CONFIG_SENSORS_G762 is not set
# CONFIG_SENSORS_HIH6130 is not set
CONFIG_SENSORS_IBMAEM=m
CONFIG_SENSORS_IBMPEX=m
CONFIG_SENSORS_I5500=m
CONFIG_SENSORS_CORETEMP=m
CONFIG_SENSORS_IT87=m
CONFIG_SENSORS_JC42=m
# CONFIG_SENSORS_POWR1220 is not set
CONFIG_SENSORS_LINEAGE=m
# CONFIG_SENSORS_LTC2945 is not set
# CONFIG_SENSORS_LTC2947_I2C is not set
# CONFIG_SENSORS_LTC2947_SPI is not set
# CONFIG_SENSORS_LTC2990 is not set
# CONFIG_SENSORS_LTC2992 is not set
CONFIG_SENSORS_LTC4151=m
CONFIG_SENSORS_LTC4215=m
# CONFIG_SENSORS_LTC4222 is not set
CONFIG_SENSORS_LTC4245=m
# CONFIG_SENSORS_LTC4260 is not set
CONFIG_SENSORS_LTC4261=m
# CONFIG_SENSORS_MAX1111 is not set
# CONFIG_SENSORS_MAX127 is not set
CONFIG_SENSORS_MAX16065=m
CONFIG_SENSORS_MAX1619=m
CONFIG_SENSORS_MAX1668=m
CONFIG_SENSORS_MAX197=m
# CONFIG_SENSORS_MAX31722 is not set
# CONFIG_SENSORS_MAX31730 is not set
# CONFIG_SENSORS_MAX6621 is not set
CONFIG_SENSORS_MAX6639=m
CONFIG_SENSORS_MAX6642=m
CONFIG_SENSORS_MAX6650=m
CONFIG_SENSORS_MAX6697=m
# CONFIG_SENSORS_MAX31790 is not set
CONFIG_SENSORS_MCP3021=m
# CONFIG_SENSORS_MLXREG_FAN is not set
# CONFIG_SENSORS_TC654 is not set
# CONFIG_SENSORS_TPS23861 is not set
# CONFIG_SENSORS_MR75203 is not set
# CONFIG_SENSORS_ADCXX is not set
CONFIG_SENSORS_LM63=m
# CONFIG_SENSORS_LM70 is not set
CONFIG_SENSORS_LM73=m
CONFIG_SENSORS_LM75=m
CONFIG_SENSORS_LM77=m
CONFIG_SENSORS_LM78=m
CONFIG_SENSORS_LM80=m
CONFIG_SENSORS_LM83=m
CONFIG_SENSORS_LM85=m
CONFIG_SENSORS_LM87=m
CONFIG_SENSORS_LM90=m
CONFIG_SENSORS_LM92=m
CONFIG_SENSORS_LM93=m
CONFIG_SENSORS_LM95234=m
CONFIG_SENSORS_LM95241=m
CONFIG_SENSORS_LM95245=m
CONFIG_SENSORS_PC87360=m
CONFIG_SENSORS_PC87427=m
CONFIG_SENSORS_NTC_THERMISTOR=m
# CONFIG_SENSORS_NCT6683 is not set
CONFIG_SENSORS_NCT6775=m
# CONFIG_SENSORS_NCT7802 is not set
# CONFIG_SENSORS_NCT7904 is not set
# CONFIG_SENSORS_NPCM7XX is not set
CONFIG_SENSORS_PCF8591=m
CONFIG_PMBUS=m
CONFIG_SENSORS_PMBUS=m
# CONFIG_SENSORS_ADM1266 is not set
CONFIG_SENSORS_ADM1275=m
# CONFIG_SENSORS_BEL_PFE is not set
# CONFIG_SENSORS_IBM_CFFPS is not set
# CONFIG_SENSORS_INSPUR_IPSPS is not set
# CONFIG_SENSORS_IR35221 is not set
# CONFIG_SENSORS_IR38064 is not set
# CONFIG_SENSORS_IRPS5401 is not set
# CONFIG_SENSORS_ISL68137 is not set
CONFIG_SENSORS_LM25066=m
CONFIG_SENSORS_LTC2978=m
# CONFIG_SENSORS_LTC3815 is not set
CONFIG_SENSORS_MAX16064=m
# CONFIG_SENSORS_MAX16601 is not set
# CONFIG_SENSORS_MAX20730 is not set
# CONFIG_SENSORS_MAX20751 is not set
# CONFIG_SENSORS_MAX31785 is not set
CONFIG_SENSORS_MAX34440=m
CONFIG_SENSORS_MAX8688=m
# CONFIG_SENSORS_MP2975 is not set
# CONFIG_SENSORS_PM6764TR is not set
# CONFIG_SENSORS_PXE1610 is not set
# CONFIG_SENSORS_Q54SJ108A2 is not set
# CONFIG_SENSORS_TPS40422 is not set
# CONFIG_SENSORS_TPS53679 is not set
CONFIG_SENSORS_UCD9000=m
CONFIG_SENSORS_UCD9200=m
# CONFIG_SENSORS_XDPE122 is not set
CONFIG_SENSORS_ZL6100=m
# CONFIG_SENSORS_SBTSI is not set
CONFIG_SENSORS_SHT15=m
CONFIG_SENSORS_SHT21=m
# CONFIG_SENSORS_SHT3x is not set
# CONFIG_SENSORS_SHTC1 is not set
CONFIG_SENSORS_SIS5595=m
CONFIG_SENSORS_DME1737=m
CONFIG_SENSORS_EMC1403=m
# CONFIG_SENSORS_EMC2103 is not set
CONFIG_SENSORS_EMC6W201=m
CONFIG_SENSORS_SMSC47M1=m
CONFIG_SENSORS_SMSC47M192=m
CONFIG_SENSORS_SMSC47B397=m
CONFIG_SENSORS_SCH56XX_COMMON=m
CONFIG_SENSORS_SCH5627=m
CONFIG_SENSORS_SCH5636=m
# CONFIG_SENSORS_STTS751 is not set
# CONFIG_SENSORS_SMM665 is not set
# CONFIG_SENSORS_ADC128D818 is not set
CONFIG_SENSORS_ADS7828=m
# CONFIG_SENSORS_ADS7871 is not set
CONFIG_SENSORS_AMC6821=m
CONFIG_SENSORS_INA209=m
CONFIG_SENSORS_INA2XX=m
# CONFIG_SENSORS_INA3221 is not set
# CONFIG_SENSORS_TC74 is not set
CONFIG_SENSORS_THMC50=m
CONFIG_SENSORS_TMP102=m
# CONFIG_SENSORS_TMP103 is not set
# CONFIG_SENSORS_TMP108 is not set
CONFIG_SENSORS_TMP401=m
CONFIG_SENSORS_TMP421=m
# CONFIG_SENSORS_TMP513 is not set
CONFIG_SENSORS_VIA_CPUTEMP=m
CONFIG_SENSORS_VIA686A=m
CONFIG_SENSORS_VT1211=m
CONFIG_SENSORS_VT8231=m
# CONFIG_SENSORS_W83773G is not set
CONFIG_SENSORS_W83781D=m
CONFIG_SENSORS_W83791D=m
CONFIG_SENSORS_W83792D=m
CONFIG_SENSORS_W83793=m
CONFIG_SENSORS_W83795=m
# CONFIG_SENSORS_W83795_FANCTRL is not set
CONFIG_SENSORS_W83L785TS=m
CONFIG_SENSORS_W83L786NG=m
CONFIG_SENSORS_W83627HF=m
CONFIG_SENSORS_W83627EHF=m
# CONFIG_SENSORS_XGENE is not set

#
# ACPI drivers
#
CONFIG_SENSORS_ACPI_POWER=m
CONFIG_SENSORS_ATK0110=m
CONFIG_THERMAL=y
# CONFIG_THERMAL_NETLINK is not set
# CONFIG_THERMAL_STATISTICS is not set
CONFIG_THERMAL_EMERGENCY_POWEROFF_DELAY_MS=0
CONFIG_THERMAL_HWMON=y
CONFIG_THERMAL_WRITABLE_TRIPS=y
CONFIG_THERMAL_DEFAULT_GOV_STEP_WISE=y
# CONFIG_THERMAL_DEFAULT_GOV_FAIR_SHARE is not set
# CONFIG_THERMAL_DEFAULT_GOV_USER_SPACE is not set
CONFIG_THERMAL_GOV_FAIR_SHARE=y
CONFIG_THERMAL_GOV_STEP_WISE=y
CONFIG_THERMAL_GOV_BANG_BANG=y
CONFIG_THERMAL_GOV_USER_SPACE=y
# CONFIG_THERMAL_EMULATION is not set

#
# Intel thermal drivers
#
CONFIG_INTEL_POWERCLAMP=m
CONFIG_X86_THERMAL_VECTOR=y
CONFIG_X86_PKG_TEMP_THERMAL=m
CONFIG_INTEL_SOC_DTS_IOSF_CORE=m
# CONFIG_INTEL_SOC_DTS_THERMAL is not set

#
# ACPI INT340X thermal drivers
#
CONFIG_INT340X_THERMAL=m
CONFIG_ACPI_THERMAL_REL=m
# CONFIG_INT3406_THERMAL is not set
CONFIG_PROC_THERMAL_MMIO_RAPL=m
# end of ACPI INT340X thermal drivers

CONFIG_INTEL_PCH_THERMAL=m
# end of Intel thermal drivers

CONFIG_WATCHDOG=y
CONFIG_WATCHDOG_CORE=y
# CONFIG_WATCHDOG_NOWAYOUT is not set
CONFIG_WATCHDOG_HANDLE_BOOT_ENABLED=y
CONFIG_WATCHDOG_OPEN_TIMEOUT=0
CONFIG_WATCHDOG_SYSFS=y

#
# Watchdog Pretimeout Governors
#
# CONFIG_WATCHDOG_PRETIMEOUT_GOV is not set

#
# Watchdog Device Drivers
#
CONFIG_SOFT_WATCHDOG=m
CONFIG_WDAT_WDT=m
# CONFIG_XILINX_WATCHDOG is not set
# CONFIG_ZIIRAVE_WATCHDOG is not set
# CONFIG_MLX_WDT is not set
# CONFIG_CADENCE_WATCHDOG is not set
# CONFIG_DW_WATCHDOG is not set
# CONFIG_MAX63XX_WATCHDOG is not set
# CONFIG_ACQUIRE_WDT is not set
# CONFIG_ADVANTECH_WDT is not set
CONFIG_ALIM1535_WDT=m
CONFIG_ALIM7101_WDT=m
# CONFIG_EBC_C384_WDT is not set
CONFIG_F71808E_WDT=m
CONFIG_SP5100_TCO=m
CONFIG_SBC_FITPC2_WATCHDOG=m
# CONFIG_EUROTECH_WDT is not set
CONFIG_IB700_WDT=m
CONFIG_IBMASR=m
# CONFIG_WAFER_WDT is not set
CONFIG_I6300ESB_WDT=y
CONFIG_IE6XX_WDT=m
CONFIG_ITCO_WDT=y
CONFIG_ITCO_VENDOR_SUPPORT=y
CONFIG_IT8712F_WDT=m
CONFIG_IT87_WDT=m
CONFIG_HP_WATCHDOG=m
CONFIG_HPWDT_NMI_DECODING=y
# CONFIG_SC1200_WDT is not set
# CONFIG_PC87413_WDT is not set
CONFIG_NV_TCO=m
# CONFIG_60XX_WDT is not set
# CONFIG_CPU5_WDT is not set
CONFIG_SMSC_SCH311X_WDT=m
# CONFIG_SMSC37B787_WDT is not set
# CONFIG_TQMX86_WDT is not set
CONFIG_VIA_WDT=m
CONFIG_W83627HF_WDT=m
CONFIG_W83877F_WDT=m
CONFIG_W83977F_WDT=m
CONFIG_MACHZ_WDT=m
# CONFIG_SBC_EPX_C3_WATCHDOG is not set
CONFIG_INTEL_MEI_WDT=m
# CONFIG_NI903X_WDT is not set
# CONFIG_NIC7018_WDT is not set
# CONFIG_MEN_A21_WDT is not set
CONFIG_XEN_WDT=m

#
# PCI-based Watchdog Cards
#
CONFIG_PCIPCWATCHDOG=m
CONFIG_WDTPCI=m

#
# USB-based Watchdog Cards
#
# CONFIG_USBPCWATCHDOG is not set
CONFIG_SSB_POSSIBLE=y
# CONFIG_SSB is not set
CONFIG_BCMA_POSSIBLE=y
CONFIG_BCMA=m
CONFIG_BCMA_HOST_PCI_POSSIBLE=y
CONFIG_BCMA_HOST_PCI=y
# CONFIG_BCMA_HOST_SOC is not set
CONFIG_BCMA_DRIVER_PCI=y
CONFIG_BCMA_DRIVER_GMAC_CMN=y
CONFIG_BCMA_DRIVER_GPIO=y
# CONFIG_BCMA_DEBUG is not set

#
# Multifunction device drivers
#
CONFIG_MFD_CORE=y
# CONFIG_MFD_AS3711 is not set
# CONFIG_PMIC_ADP5520 is not set
# CONFIG_MFD_AAT2870_CORE is not set
# CONFIG_MFD_BCM590XX is not set
# CONFIG_MFD_BD9571MWV is not set
# CONFIG_MFD_AXP20X_I2C is not set
# CONFIG_MFD_MADERA is not set
# CONFIG_PMIC_DA903X is not set
# CONFIG_MFD_DA9052_SPI is not set
# CONFIG_MFD_DA9052_I2C is not set
# CONFIG_MFD_DA9055 is not set
# CONFIG_MFD_DA9062 is not set
# CONFIG_MFD_DA9063 is not set
# CONFIG_MFD_DA9150 is not set
# CONFIG_MFD_DLN2 is not set
# CONFIG_MFD_MC13XXX_SPI is not set
# CONFIG_MFD_MC13XXX_I2C is not set
# CONFIG_MFD_MP2629 is not set
# CONFIG_HTC_PASIC3 is not set
# CONFIG_HTC_I2CPLD is not set
# CONFIG_MFD_INTEL_QUARK_I2C_GPIO is not set
CONFIG_LPC_ICH=y
CONFIG_LPC_SCH=m
# CONFIG_INTEL_SOC_PMIC_CHTDC_TI is not set
CONFIG_MFD_INTEL_LPSS=y
CONFIG_MFD_INTEL_LPSS_ACPI=y
CONFIG_MFD_INTEL_LPSS_PCI=y
# CONFIG_MFD_INTEL_PMC_BXT is not set
# CONFIG_MFD_INTEL_PMT is not set
# CONFIG_MFD_IQS62X is not set
# CONFIG_MFD_JANZ_CMODIO is not set
# CONFIG_MFD_KEMPLD is not set
# CONFIG_MFD_88PM800 is not set
# CONFIG_MFD_88PM805 is not set
# CONFIG_MFD_88PM860X is not set
# CONFIG_MFD_MAX14577 is not set
# CONFIG_MFD_MAX77693 is not set
# CONFIG_MFD_MAX77843 is not set
# CONFIG_MFD_MAX8907 is not set
# CONFIG_MFD_MAX8925 is not set
# CONFIG_MFD_MAX8997 is not set
# CONFIG_MFD_MAX8998 is not set
# CONFIG_MFD_MT6360 is not set
# CONFIG_MFD_MT6397 is not set
# CONFIG_MFD_MENF21BMC is not set
# CONFIG_EZX_PCAP is not set
# CONFIG_MFD_VIPERBOARD is not set
# CONFIG_MFD_RETU is not set
# CONFIG_MFD_PCF50633 is not set
# CONFIG_MFD_RDC321X is not set
# CONFIG_MFD_RT5033 is not set
# CONFIG_MFD_RC5T583 is not set
# CONFIG_MFD_SEC_CORE is not set
# CONFIG_MFD_SI476X_CORE is not set
CONFIG_MFD_SM501=m
CONFIG_MFD_SM501_GPIO=y
# CONFIG_MFD_SKY81452 is not set
# CONFIG_ABX500_CORE is not set
# CONFIG_MFD_SYSCON is not set
# CONFIG_MFD_TI_AM335X_TSCADC is not set
# CONFIG_MFD_LP3943 is not set
# CONFIG_MFD_LP8788 is not set
# CONFIG_MFD_TI_LMU is not set
# CONFIG_MFD_PALMAS is not set
# CONFIG_TPS6105X is not set
# CONFIG_TPS65010 is not set
# CONFIG_TPS6507X is not set
# CONFIG_MFD_TPS65086 is not set
# CONFIG_MFD_TPS65090 is not set
# CONFIG_MFD_TI_LP873X is not set
# CONFIG_MFD_TPS6586X is not set
# CONFIG_MFD_TPS65910 is not set
# CONFIG_MFD_TPS65912_I2C is not set
# CONFIG_MFD_TPS65912_SPI is not set
# CONFIG_MFD_TPS80031 is not set
# CONFIG_TWL4030_CORE is not set
# CONFIG_TWL6040_CORE is not set
# CONFIG_MFD_WL1273_CORE is not set
# CONFIG_MFD_LM3533 is not set
# CONFIG_MFD_TQMX86 is not set
CONFIG_MFD_VX855=m
# CONFIG_MFD_ARIZONA_I2C is not set
# CONFIG_MFD_ARIZONA_SPI is not set
# CONFIG_MFD_WM8400 is not set
# CONFIG_MFD_WM831X_I2C is not set
# CONFIG_MFD_WM831X_SPI is not set
# CONFIG_MFD_WM8350_I2C is not set
# CONFIG_MFD_WM8994 is not set
# CONFIG_MFD_INTEL_M10_BMC is not set
# end of Multifunction device drivers

# CONFIG_REGULATOR is not set
CONFIG_RC_CORE=m
CONFIG_RC_MAP=m
CONFIG_LIRC=y
CONFIG_RC_DECODERS=y
CONFIG_IR_NEC_DECODER=m
CONFIG_IR_RC5_DECODER=m
CONFIG_IR_RC6_DECODER=m
CONFIG_IR_JVC_DECODER=m
CONFIG_IR_SONY_DECODER=m
CONFIG_IR_SANYO_DECODER=m
# CONFIG_IR_SHARP_DECODER is not set
CONFIG_IR_MCE_KBD_DECODER=m
# CONFIG_IR_XMP_DECODER is not set
CONFIG_IR_IMON_DECODER=m
# CONFIG_IR_RCMM_DECODER is not set
CONFIG_RC_DEVICES=y
# CONFIG_RC_ATI_REMOTE is not set
CONFIG_IR_ENE=m
# CONFIG_IR_IMON is not set
# CONFIG_IR_IMON_RAW is not set
# CONFIG_IR_MCEUSB is not set
CONFIG_IR_ITE_CIR=m
CONFIG_IR_FINTEK=m
CONFIG_IR_NUVOTON=m
# CONFIG_IR_REDRAT3 is not set
# CONFIG_IR_STREAMZAP is not set
CONFIG_IR_WINBOND_CIR=m
# CONFIG_IR_IGORPLUGUSB is not set
# CONFIG_IR_IGUANA is not set
# CONFIG_IR_TTUSBIR is not set
# CONFIG_RC_LOOPBACK is not set
CONFIG_IR_SERIAL=m
CONFIG_IR_SERIAL_TRANSMITTER=y
CONFIG_IR_SIR=m
# CONFIG_RC_XBOX_DVD is not set
# CONFIG_IR_TOY is not set
CONFIG_MEDIA_CEC_SUPPORT=y
# CONFIG_CEC_CH7322 is not set
# CONFIG_CEC_SECO is not set
# CONFIG_USB_PULSE8_CEC is not set
# CONFIG_USB_RAINSHADOW_CEC is not set
CONFIG_MEDIA_SUPPORT=m
# CONFIG_MEDIA_SUPPORT_FILTER is not set
# CONFIG_MEDIA_SUBDRV_AUTOSELECT is not set

#
# Media device types
#
CONFIG_MEDIA_CAMERA_SUPPORT=y
CONFIG_MEDIA_ANALOG_TV_SUPPORT=y
CONFIG_MEDIA_DIGITAL_TV_SUPPORT=y
CONFIG_MEDIA_RADIO_SUPPORT=y
CONFIG_MEDIA_SDR_SUPPORT=y
CONFIG_MEDIA_PLATFORM_SUPPORT=y
CONFIG_MEDIA_TEST_SUPPORT=y
# end of Media device types

#
# Media core support
#
CONFIG_VIDEO_DEV=m
CONFIG_MEDIA_CONTROLLER=y
CONFIG_DVB_CORE=m
# end of Media core support

#
# Video4Linux options
#
CONFIG_VIDEO_V4L2=m
CONFIG_VIDEO_V4L2_I2C=y
CONFIG_VIDEO_V4L2_SUBDEV_API=y
# CONFIG_VIDEO_ADV_DEBUG is not set
# CONFIG_VIDEO_FIXED_MINOR_RANGES is not set
# end of Video4Linux options

#
# Media controller options
#
# CONFIG_MEDIA_CONTROLLER_DVB is not set
# end of Media controller options

#
# Digital TV options
#
# CONFIG_DVB_MMAP is not set
CONFIG_DVB_NET=y
CONFIG_DVB_MAX_ADAPTERS=16
CONFIG_DVB_DYNAMIC_MINORS=y
# CONFIG_DVB_DEMUX_SECTION_LOSS_LOG is not set
# CONFIG_DVB_ULE_DEBUG is not set
# end of Digital TV options

#
# Media drivers
#
# CONFIG_MEDIA_USB_SUPPORT is not set
# CONFIG_MEDIA_PCI_SUPPORT is not set
CONFIG_RADIO_ADAPTERS=y
# CONFIG_RADIO_SI470X is not set
# CONFIG_RADIO_SI4713 is not set
# CONFIG_USB_MR800 is not set
# CONFIG_USB_DSBR is not set
# CONFIG_RADIO_MAXIRADIO is not set
# CONFIG_RADIO_SHARK is not set
# CONFIG_RADIO_SHARK2 is not set
# CONFIG_USB_KEENE is not set
# CONFIG_USB_RAREMONO is not set
# CONFIG_USB_MA901 is not set
# CONFIG_RADIO_TEA5764 is not set
# CONFIG_RADIO_SAA7706H is not set
# CONFIG_RADIO_TEF6862 is not set
# CONFIG_RADIO_WL1273 is not set
CONFIG_VIDEOBUF2_CORE=m
CONFIG_VIDEOBUF2_V4L2=m
CONFIG_VIDEOBUF2_MEMOPS=m
CONFIG_VIDEOBUF2_VMALLOC=m
# CONFIG_V4L_PLATFORM_DRIVERS is not set
# CONFIG_V4L_MEM2MEM_DRIVERS is not set
# CONFIG_DVB_PLATFORM_DRIVERS is not set
# CONFIG_SDR_PLATFORM_DRIVERS is not set

#
# MMC/SDIO DVB adapters
#
# CONFIG_SMS_SDIO_DRV is not set
# CONFIG_V4L_TEST_DRIVERS is not set
# CONFIG_DVB_TEST_DRIVERS is not set

#
# FireWire (IEEE 1394) Adapters
#
# CONFIG_DVB_FIREDTV is not set
# end of Media drivers

#
# Media ancillary drivers
#
CONFIG_MEDIA_ATTACH=y
CONFIG_VIDEO_IR_I2C=m

#
# Audio decoders, processors and mixers
#
# CONFIG_VIDEO_TVAUDIO is not set
# CONFIG_VIDEO_TDA7432 is not set
# CONFIG_VIDEO_TDA9840 is not set
# CONFIG_VIDEO_TEA6415C is not set
# CONFIG_VIDEO_TEA6420 is not set
# CONFIG_VIDEO_MSP3400 is not set
# CONFIG_VIDEO_CS3308 is not set
# CONFIG_VIDEO_CS5345 is not set
# CONFIG_VIDEO_CS53L32A is not set
# CONFIG_VIDEO_TLV320AIC23B is not set
# CONFIG_VIDEO_UDA1342 is not set
# CONFIG_VIDEO_WM8775 is not set
# CONFIG_VIDEO_WM8739 is not set
# CONFIG_VIDEO_VP27SMPX is not set
# CONFIG_VIDEO_SONY_BTF_MPX is not set
# end of Audio decoders, processors and mixers

#
# RDS decoders
#
# CONFIG_VIDEO_SAA6588 is not set
# end of RDS decoders

#
# Video decoders
#
# CONFIG_VIDEO_ADV7180 is not set
# CONFIG_VIDEO_ADV7183 is not set
# CONFIG_VIDEO_ADV7604 is not set
# CONFIG_VIDEO_ADV7842 is not set
# CONFIG_VIDEO_BT819 is not set
# CONFIG_VIDEO_BT856 is not set
# CONFIG_VIDEO_BT866 is not set
# CONFIG_VIDEO_KS0127 is not set
# CONFIG_VIDEO_ML86V7667 is not set
# CONFIG_VIDEO_SAA7110 is not set
# CONFIG_VIDEO_SAA711X is not set
# CONFIG_VIDEO_TC358743 is not set
# CONFIG_VIDEO_TVP514X is not set
# CONFIG_VIDEO_TVP5150 is not set
# CONFIG_VIDEO_TVP7002 is not set
# CONFIG_VIDEO_TW2804 is not set
# CONFIG_VIDEO_TW9903 is not set
# CONFIG_VIDEO_TW9906 is not set
# CONFIG_VIDEO_TW9910 is not set
# CONFIG_VIDEO_VPX3220 is not set

#
# Video and audio decoders
#
# CONFIG_VIDEO_SAA717X is not set
# CONFIG_VIDEO_CX25840 is not set
# end of Video decoders

#
# Video encoders
#
# CONFIG_VIDEO_SAA7127 is not set
# CONFIG_VIDEO_SAA7185 is not set
# CONFIG_VIDEO_ADV7170 is not set
# CONFIG_VIDEO_ADV7175 is not set
# CONFIG_VIDEO_ADV7343 is not set
# CONFIG_VIDEO_ADV7393 is not set
# CONFIG_VIDEO_ADV7511 is not set
# CONFIG_VIDEO_AD9389B is not set
# CONFIG_VIDEO_AK881X is not set
# CONFIG_VIDEO_THS8200 is not set
# end of Video encoders

#
# Video improvement chips
#
# CONFIG_VIDEO_UPD64031A is not set
# CONFIG_VIDEO_UPD64083 is not set
# end of Video improvement chips

#
# Audio/Video compression chips
#
# CONFIG_VIDEO_SAA6752HS is not set
# end of Audio/Video compression chips

#
# SDR tuner chips
#
# CONFIG_SDR_MAX2175 is not set
# end of SDR tuner chips

#
# Miscellaneous helper chips
#
# CONFIG_VIDEO_THS7303 is not set
# CONFIG_VIDEO_M52790 is not set
# CONFIG_VIDEO_I2C is not set
# CONFIG_VIDEO_ST_MIPID02 is not set
# end of Miscellaneous helper chips

#
# Camera sensor devices
#
# CONFIG_VIDEO_HI556 is not set
# CONFIG_VIDEO_IMX214 is not set
# CONFIG_VIDEO_IMX219 is not set
# CONFIG_VIDEO_IMX258 is not set
# CONFIG_VIDEO_IMX274 is not set
# CONFIG_VIDEO_IMX290 is not set
# CONFIG_VIDEO_IMX319 is not set
# CONFIG_VIDEO_IMX355 is not set
# CONFIG_VIDEO_OV02A10 is not set
# CONFIG_VIDEO_OV2640 is not set
# CONFIG_VIDEO_OV2659 is not set
# CONFIG_VIDEO_OV2680 is not set
# CONFIG_VIDEO_OV2685 is not set
# CONFIG_VIDEO_OV2740 is not set
# CONFIG_VIDEO_OV5647 is not set
# CONFIG_VIDEO_OV5648 is not set
# CONFIG_VIDEO_OV6650 is not set
# CONFIG_VIDEO_OV5670 is not set
# CONFIG_VIDEO_OV5675 is not set
# CONFIG_VIDEO_OV5695 is not set
# CONFIG_VIDEO_OV7251 is not set
# CONFIG_VIDEO_OV772X is not set
# CONFIG_VIDEO_OV7640 is not set
# CONFIG_VIDEO_OV7670 is not set
# CONFIG_VIDEO_OV7740 is not set
# CONFIG_VIDEO_OV8856 is not set
# CONFIG_VIDEO_OV8865 is not set
# CONFIG_VIDEO_OV9640 is not set
# CONFIG_VIDEO_OV9650 is not set
# CONFIG_VIDEO_OV9734 is not set
# CONFIG_VIDEO_OV13858 is not set
# CONFIG_VIDEO_VS6624 is not set
# CONFIG_VIDEO_MT9M001 is not set
# CONFIG_VIDEO_MT9M032 is not set
# CONFIG_VIDEO_MT9M111 is not set
# CONFIG_VIDEO_MT9P031 is not set
# CONFIG_VIDEO_MT9T001 is not set
# CONFIG_VIDEO_MT9T112 is not set
# CONFIG_VIDEO_MT9V011 is not set
# CONFIG_VIDEO_MT9V032 is not set
# CONFIG_VIDEO_MT9V111 is not set
# CONFIG_VIDEO_SR030PC30 is not set
# CONFIG_VIDEO_NOON010PC30 is not set
# CONFIG_VIDEO_M5MOLS is not set
# CONFIG_VIDEO_RDACM20 is not set
# CONFIG_VIDEO_RDACM21 is not set
# CONFIG_VIDEO_RJ54N1 is not set
# CONFIG_VIDEO_S5K6AA is not set
# CONFIG_VIDEO_S5K6A3 is not set
# CONFIG_VIDEO_S5K4ECGX is not set
# CONFIG_VIDEO_S5K5BAF is not set
# CONFIG_VIDEO_CCS is not set
# CONFIG_VIDEO_ET8EK8 is not set
# CONFIG_VIDEO_S5C73M3 is not set
# end of Camera sensor devices

#
# Lens drivers
#
# CONFIG_VIDEO_AD5820 is not set
# CONFIG_VIDEO_AK7375 is not set
# CONFIG_VIDEO_DW9714 is not set
# CONFIG_VIDEO_DW9768 is not set
# CONFIG_VIDEO_DW9807_VCM is not set
# end of Lens drivers

#
# Flash devices
#
# CONFIG_VIDEO_ADP1653 is not set
# CONFIG_VIDEO_LM3560 is not set
# CONFIG_VIDEO_LM3646 is not set
# end of Flash devices

#
# SPI helper chips
#
# CONFIG_VIDEO_GS1662 is not set
# end of SPI helper chips

#
# Media SPI Adapters
#
CONFIG_CXD2880_SPI_DRV=m
# end of Media SPI Adapters

CONFIG_MEDIA_TUNER=m

#
# Customize TV tuners
#
CONFIG_MEDIA_TUNER_SIMPLE=m
CONFIG_MEDIA_TUNER_TDA18250=m
CONFIG_MEDIA_TUNER_TDA8290=m
CONFIG_MEDIA_TUNER_TDA827X=m
CONFIG_MEDIA_TUNER_TDA18271=m
CONFIG_MEDIA_TUNER_TDA9887=m
CONFIG_MEDIA_TUNER_TEA5761=m
CONFIG_MEDIA_TUNER_TEA5767=m
CONFIG_MEDIA_TUNER_MSI001=m
CONFIG_MEDIA_TUNER_MT20XX=m
CONFIG_MEDIA_TUNER_MT2060=m
CONFIG_MEDIA_TUNER_MT2063=m
CONFIG_MEDIA_TUNER_MT2266=m
CONFIG_MEDIA_TUNER_MT2131=m
CONFIG_MEDIA_TUNER_QT1010=m
CONFIG_MEDIA_TUNER_XC2028=m
CONFIG_MEDIA_TUNER_XC5000=m
CONFIG_MEDIA_TUNER_XC4000=m
CONFIG_MEDIA_TUNER_MXL5005S=m
CONFIG_MEDIA_TUNER_MXL5007T=m
CONFIG_MEDIA_TUNER_MC44S803=m
CONFIG_MEDIA_TUNER_MAX2165=m
CONFIG_MEDIA_TUNER_TDA18218=m
CONFIG_MEDIA_TUNER_FC0011=m
CONFIG_MEDIA_TUNER_FC0012=m
CONFIG_MEDIA_TUNER_FC0013=m
CONFIG_MEDIA_TUNER_TDA18212=m
CONFIG_MEDIA_TUNER_E4000=m
CONFIG_MEDIA_TUNER_FC2580=m
CONFIG_MEDIA_TUNER_M88RS6000T=m
CONFIG_MEDIA_TUNER_TUA9001=m
CONFIG_MEDIA_TUNER_SI2157=m
CONFIG_MEDIA_TUNER_IT913X=m
CONFIG_MEDIA_TUNER_R820T=m
CONFIG_MEDIA_TUNER_MXL301RF=m
CONFIG_MEDIA_TUNER_QM1D1C0042=m
CONFIG_MEDIA_TUNER_QM1D1B0004=m
# end of Customize TV tuners

#
# Customise DVB Frontends
#

#
# Multistandard (satellite) frontends
#
CONFIG_DVB_STB0899=m
CONFIG_DVB_STB6100=m
CONFIG_DVB_STV090x=m
CONFIG_DVB_STV0910=m
CONFIG_DVB_STV6110x=m
CONFIG_DVB_STV6111=m
CONFIG_DVB_MXL5XX=m
CONFIG_DVB_M88DS3103=m

#
# Multistandard (cable + terrestrial) frontends
#
CONFIG_DVB_DRXK=m
CONFIG_DVB_TDA18271C2DD=m
CONFIG_DVB_SI2165=m
CONFIG_DVB_MN88472=m
CONFIG_DVB_MN88473=m

#
# DVB-S (satellite) frontends
#
CONFIG_DVB_CX24110=m
CONFIG_DVB_CX24123=m
CONFIG_DVB_MT312=m
CONFIG_DVB_ZL10036=m
CONFIG_DVB_ZL10039=m
CONFIG_DVB_S5H1420=m
CONFIG_DVB_STV0288=m
CONFIG_DVB_STB6000=m
CONFIG_DVB_STV0299=m
CONFIG_DVB_STV6110=m
CONFIG_DVB_STV0900=m
CONFIG_DVB_TDA8083=m
CONFIG_DVB_TDA10086=m
CONFIG_DVB_TDA8261=m
CONFIG_DVB_VES1X93=m
CONFIG_DVB_TUNER_ITD1000=m
CONFIG_DVB_TUNER_CX24113=m
CONFIG_DVB_TDA826X=m
CONFIG_DVB_TUA6100=m
CONFIG_DVB_CX24116=m
CONFIG_DVB_CX24117=m
CONFIG_DVB_CX24120=m
CONFIG_DVB_SI21XX=m
CONFIG_DVB_TS2020=m
CONFIG_DVB_DS3000=m
CONFIG_DVB_MB86A16=m
CONFIG_DVB_TDA10071=m

#
# DVB-T (terrestrial) frontends
#
CONFIG_DVB_SP8870=m
CONFIG_DVB_SP887X=m
CONFIG_DVB_CX22700=m
CONFIG_DVB_CX22702=m
CONFIG_DVB_S5H1432=m
CONFIG_DVB_DRXD=m
CONFIG_DVB_L64781=m
CONFIG_DVB_TDA1004X=m
CONFIG_DVB_NXT6000=m
CONFIG_DVB_MT352=m
CONFIG_DVB_ZL10353=m
CONFIG_DVB_DIB3000MB=m
CONFIG_DVB_DIB3000MC=m
CONFIG_DVB_DIB7000M=m
CONFIG_DVB_DIB7000P=m
CONFIG_DVB_DIB9000=m
CONFIG_DVB_TDA10048=m
CONFIG_DVB_AF9013=m
CONFIG_DVB_EC100=m
CONFIG_DVB_STV0367=m
CONFIG_DVB_CXD2820R=m
CONFIG_DVB_CXD2841ER=m
CONFIG_DVB_RTL2830=m
CONFIG_DVB_RTL2832=m
CONFIG_DVB_RTL2832_SDR=m
CONFIG_DVB_SI2168=m
CONFIG_DVB_ZD1301_DEMOD=m
CONFIG_DVB_CXD2880=m

#
# DVB-C (cable) frontends
#
CONFIG_DVB_VES1820=m
CONFIG_DVB_TDA10021=m
CONFIG_DVB_TDA10023=m
CONFIG_DVB_STV0297=m

#
# ATSC (North American/Korean Terrestrial/Cable DTV) frontends
#
CONFIG_DVB_NXT200X=m
CONFIG_DVB_OR51211=m
CONFIG_DVB_OR51132=m
CONFIG_DVB_BCM3510=m
CONFIG_DVB_LGDT330X=m
CONFIG_DVB_LGDT3305=m
CONFIG_DVB_LGDT3306A=m
CONFIG_DVB_LG2160=m
CONFIG_DVB_S5H1409=m
CONFIG_DVB_AU8522=m
CONFIG_DVB_AU8522_DTV=m
CONFIG_DVB_AU8522_V4L=m
CONFIG_DVB_S5H1411=m
CONFIG_DVB_MXL692=m

#
# ISDB-T (terrestrial) frontends
#
CONFIG_DVB_S921=m
CONFIG_DVB_DIB8000=m
CONFIG_DVB_MB86A20S=m

#
# ISDB-S (satellite) & ISDB-T (terrestrial) frontends
#
CONFIG_DVB_TC90522=m
CONFIG_DVB_MN88443X=m

#
# Digital terrestrial only tuners/PLL
#
CONFIG_DVB_PLL=m
CONFIG_DVB_TUNER_DIB0070=m
CONFIG_DVB_TUNER_DIB0090=m

#
# SEC control devices for DVB-S
#
CONFIG_DVB_DRX39XYJ=m
CONFIG_DVB_LNBH25=m
CONFIG_DVB_LNBH29=m
CONFIG_DVB_LNBP21=m
CONFIG_DVB_LNBP22=m
CONFIG_DVB_ISL6405=m
CONFIG_DVB_ISL6421=m
CONFIG_DVB_ISL6423=m
CONFIG_DVB_A8293=m
CONFIG_DVB_LGS8GL5=m
CONFIG_DVB_LGS8GXX=m
CONFIG_DVB_ATBM8830=m
CONFIG_DVB_TDA665x=m
CONFIG_DVB_IX2505V=m
CONFIG_DVB_M88RS2000=m
CONFIG_DVB_AF9033=m
CONFIG_DVB_HORUS3A=m
CONFIG_DVB_ASCOT2E=m
CONFIG_DVB_HELENE=m

#
# Common Interface (EN50221) controller drivers
#
CONFIG_DVB_CXD2099=m
CONFIG_DVB_SP2=m
# end of Customise DVB Frontends

#
# Tools to develop new frontends
#
# CONFIG_DVB_DUMMY_FE is not set
# end of Media ancillary drivers

#
# Graphics support
#
# CONFIG_AGP is not set
CONFIG_INTEL_GTT=m
CONFIG_VGA_ARB=y
CONFIG_VGA_ARB_MAX_GPUS=64
CONFIG_VGA_SWITCHEROO=y
CONFIG_DRM=m
CONFIG_DRM_MIPI_DSI=y
CONFIG_DRM_DP_AUX_CHARDEV=y
# CONFIG_DRM_DEBUG_SELFTEST is not set
CONFIG_DRM_KMS_HELPER=m
CONFIG_DRM_KMS_FB_HELPER=y
CONFIG_DRM_FBDEV_EMULATION=y
CONFIG_DRM_FBDEV_OVERALLOC=100
CONFIG_DRM_LOAD_EDID_FIRMWARE=y
# CONFIG_DRM_DP_CEC is not set
CONFIG_DRM_TTM=m
CONFIG_DRM_VRAM_HELPER=m
CONFIG_DRM_TTM_HELPER=m
CONFIG_DRM_GEM_SHMEM_HELPER=y

#
# I2C encoder or helper chips
#
CONFIG_DRM_I2C_CH7006=m
CONFIG_DRM_I2C_SIL164=m
# CONFIG_DRM_I2C_NXP_TDA998X is not set
# CONFIG_DRM_I2C_NXP_TDA9950 is not set
# end of I2C encoder or helper chips

#
# ARM devices
#
# end of ARM devices

# CONFIG_DRM_RADEON is not set
# CONFIG_DRM_AMDGPU is not set
# CONFIG_DRM_NOUVEAU is not set
CONFIG_DRM_I915=m
CONFIG_DRM_I915_FORCE_PROBE=""
CONFIG_DRM_I915_CAPTURE_ERROR=y
CONFIG_DRM_I915_COMPRESS_ERROR=y
CONFIG_DRM_I915_USERPTR=y
CONFIG_DRM_I915_GVT=y
CONFIG_DRM_I915_GVT_KVMGT=m
CONFIG_DRM_I915_FENCE_TIMEOUT=10000
CONFIG_DRM_I915_USERFAULT_AUTOSUSPEND=250
CONFIG_DRM_I915_HEARTBEAT_INTERVAL=2500
CONFIG_DRM_I915_PREEMPT_TIMEOUT=640
CONFIG_DRM_I915_MAX_REQUEST_BUSYWAIT=8000
CONFIG_DRM_I915_STOP_TIMEOUT=100
CONFIG_DRM_I915_TIMESLICE_DURATION=1
# CONFIG_DRM_VGEM is not set
# CONFIG_DRM_VKMS is not set
# CONFIG_DRM_VMWGFX is not set
CONFIG_DRM_GMA500=m
CONFIG_DRM_GMA600=y
# CONFIG_DRM_UDL is not set
CONFIG_DRM_AST=m
CONFIG_DRM_MGAG200=m
CONFIG_DRM_QXL=m
CONFIG_DRM_BOCHS=m
CONFIG_DRM_VIRTIO_GPU=m
CONFIG_DRM_PANEL=y

#
# Display Panels
#
# CONFIG_DRM_PANEL_RASPBERRYPI_TOUCHSCREEN is not set
# end of Display Panels

CONFIG_DRM_BRIDGE=y
CONFIG_DRM_PANEL_BRIDGE=y

#
# Display Interface Bridges
#
# CONFIG_DRM_ANALOGIX_ANX78XX is not set
# end of Display Interface Bridges

# CONFIG_DRM_ETNAVIV is not set
CONFIG_DRM_CIRRUS_QEMU=m
# CONFIG_DRM_GM12U320 is not set
# CONFIG_TINYDRM_HX8357D is not set
# CONFIG_TINYDRM_ILI9225 is not set
# CONFIG_TINYDRM_ILI9341 is not set
# CONFIG_TINYDRM_ILI9486 is not set
# CONFIG_TINYDRM_MI0283QT is not set
# CONFIG_TINYDRM_REPAPER is not set
# CONFIG_TINYDRM_ST7586 is not set
# CONFIG_TINYDRM_ST7735R is not set
# CONFIG_DRM_XEN is not set
# CONFIG_DRM_VBOXVIDEO is not set
# CONFIG_DRM_LEGACY is not set
CONFIG_DRM_PANEL_ORIENTATION_QUIRKS=y

#
# Frame buffer Devices
#
CONFIG_FB_CMDLINE=y
CONFIG_FB_NOTIFY=y
CONFIG_FB=y
# CONFIG_FIRMWARE_EDID is not set
CONFIG_FB_BOOT_VESA_SUPPORT=y
CONFIG_FB_CFB_FILLRECT=y
CONFIG_FB_CFB_COPYAREA=y
CONFIG_FB_CFB_IMAGEBLIT=y
CONFIG_FB_SYS_FILLRECT=m
CONFIG_FB_SYS_COPYAREA=m
CONFIG_FB_SYS_IMAGEBLIT=m
# CONFIG_FB_FOREIGN_ENDIAN is not set
CONFIG_FB_SYS_FOPS=m
CONFIG_FB_DEFERRED_IO=y
# CONFIG_FB_MODE_HELPERS is not set
CONFIG_FB_TILEBLITTING=y

#
# Frame buffer hardware drivers
#
# CONFIG_FB_CIRRUS is not set
# CONFIG_FB_PM2 is not set
# CONFIG_FB_CYBER2000 is not set
# CONFIG_FB_ARC is not set
# CONFIG_FB_ASILIANT is not set
# CONFIG_FB_IMSTT is not set
# CONFIG_FB_VGA16 is not set
# CONFIG_FB_UVESA is not set
CONFIG_FB_VESA=y
CONFIG_FB_EFI=y
# CONFIG_FB_N411 is not set
# CONFIG_FB_HGA is not set
# CONFIG_FB_OPENCORES is not set
# CONFIG_FB_S1D13XXX is not set
# CONFIG_FB_NVIDIA is not set
# CONFIG_FB_RIVA is not set
# CONFIG_FB_I740 is not set
# CONFIG_FB_LE80578 is not set
# CONFIG_FB_MATROX is not set
# CONFIG_FB_RADEON is not set
# CONFIG_FB_ATY128 is not set
# CONFIG_FB_ATY is not set
# CONFIG_FB_S3 is not set
# CONFIG_FB_SAVAGE is not set
# CONFIG_FB_SIS is not set
# CONFIG_FB_VIA is not set
# CONFIG_FB_NEOMAGIC is not set
# CONFIG_FB_KYRO is not set
# CONFIG_FB_3DFX is not set
# CONFIG_FB_VOODOO1 is not set
# CONFIG_FB_VT8623 is not set
# CONFIG_FB_TRIDENT is not set
# CONFIG_FB_ARK is not set
# CONFIG_FB_PM3 is not set
# CONFIG_FB_CARMINE is not set
# CONFIG_FB_SM501 is not set
# CONFIG_FB_SMSCUFX is not set
# CONFIG_FB_UDL is not set
# CONFIG_FB_IBM_GXT4500 is not set
# CONFIG_FB_VIRTUAL is not set
# CONFIG_XEN_FBDEV_FRONTEND is not set
# CONFIG_FB_METRONOME is not set
# CONFIG_FB_MB862XX is not set
CONFIG_FB_HYPERV=m
# CONFIG_FB_SIMPLE is not set
# CONFIG_FB_SM712 is not set
# end of Frame buffer Devices

#
# Backlight & LCD device support
#
CONFIG_LCD_CLASS_DEVICE=m
# CONFIG_LCD_L4F00242T03 is not set
# CONFIG_LCD_LMS283GF05 is not set
# CONFIG_LCD_LTV350QV is not set
# CONFIG_LCD_ILI922X is not set
# CONFIG_LCD_ILI9320 is not set
# CONFIG_LCD_TDO24M is not set
# CONFIG_LCD_VGG2432A4 is not set
CONFIG_LCD_PLATFORM=m
# CONFIG_LCD_AMS369FG06 is not set
# CONFIG_LCD_LMS501KF03 is not set
# CONFIG_LCD_HX8357 is not set
# CONFIG_LCD_OTM3225A is not set
CONFIG_BACKLIGHT_CLASS_DEVICE=y
# CONFIG_BACKLIGHT_KTD253 is not set
# CONFIG_BACKLIGHT_PWM is not set
CONFIG_BACKLIGHT_APPLE=m
# CONFIG_BACKLIGHT_QCOM_WLED is not set
# CONFIG_BACKLIGHT_SAHARA is not set
# CONFIG_BACKLIGHT_ADP8860 is not set
# CONFIG_BACKLIGHT_ADP8870 is not set
# CONFIG_BACKLIGHT_LM3630A is not set
# CONFIG_BACKLIGHT_LM3639 is not set
CONFIG_BACKLIGHT_LP855X=m
# CONFIG_BACKLIGHT_GPIO is not set
# CONFIG_BACKLIGHT_LV5207LP is not set
# CONFIG_BACKLIGHT_BD6107 is not set
# CONFIG_BACKLIGHT_ARCXCNN is not set
# end of Backlight & LCD device support

CONFIG_HDMI=y

#
# Console display driver support
#
CONFIG_VGA_CONSOLE=y
CONFIG_DUMMY_CONSOLE=y
CONFIG_DUMMY_CONSOLE_COLUMNS=80
CONFIG_DUMMY_CONSOLE_ROWS=25
CONFIG_FRAMEBUFFER_CONSOLE=y
CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY=y
CONFIG_FRAMEBUFFER_CONSOLE_ROTATION=y
# CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER is not set
# end of Console display driver support

CONFIG_LOGO=y
# CONFIG_LOGO_LINUX_MONO is not set
# CONFIG_LOGO_LINUX_VGA16 is not set
CONFIG_LOGO_LINUX_CLUT224=y
# end of Graphics support

# CONFIG_SOUND is not set

#
# HID support
#
CONFIG_HID=y
CONFIG_HID_BATTERY_STRENGTH=y
CONFIG_HIDRAW=y
CONFIG_UHID=m
CONFIG_HID_GENERIC=y

#
# Special HID drivers
#
CONFIG_HID_A4TECH=m
# CONFIG_HID_ACCUTOUCH is not set
CONFIG_HID_ACRUX=m
# CONFIG_HID_ACRUX_FF is not set
CONFIG_HID_APPLE=m
# CONFIG_HID_APPLEIR is not set
CONFIG_HID_ASUS=m
CONFIG_HID_AUREAL=m
CONFIG_HID_BELKIN=m
# CONFIG_HID_BETOP_FF is not set
# CONFIG_HID_BIGBEN_FF is not set
CONFIG_HID_CHERRY=m
CONFIG_HID_CHICONY=m
# CONFIG_HID_CORSAIR is not set
# CONFIG_HID_COUGAR is not set
# CONFIG_HID_MACALLY is not set
CONFIG_HID_CMEDIA=m
# CONFIG_HID_CP2112 is not set
# CONFIG_HID_CREATIVE_SB0540 is not set
CONFIG_HID_CYPRESS=m
CONFIG_HID_DRAGONRISE=m
# CONFIG_DRAGONRISE_FF is not set
# CONFIG_HID_EMS_FF is not set
# CONFIG_HID_ELAN is not set
CONFIG_HID_ELECOM=m
# CONFIG_HID_ELO is not set
CONFIG_HID_EZKEY=m
CONFIG_HID_GEMBIRD=m
CONFIG_HID_GFRM=m
# CONFIG_HID_GLORIOUS is not set
# CONFIG_HID_HOLTEK is not set
# CONFIG_HID_VIVALDI is not set
# CONFIG_HID_GT683R is not set
CONFIG_HID_KEYTOUCH=m
CONFIG_HID_KYE=m
# CONFIG_HID_UCLOGIC is not set
CONFIG_HID_WALTOP=m
# CONFIG_HID_VIEWSONIC is not set
CONFIG_HID_GYRATION=m
CONFIG_HID_ICADE=m
CONFIG_HID_ITE=m
CONFIG_HID_JABRA=m
CONFIG_HID_TWINHAN=m
CONFIG_HID_KENSINGTON=m
CONFIG_HID_LCPOWER=m
CONFIG_HID_LED=m
CONFIG_HID_LENOVO=m
CONFIG_HID_LOGITECH=m
CONFIG_HID_LOGITECH_DJ=m
CONFIG_HID_LOGITECH_HIDPP=m
# CONFIG_LOGITECH_FF is not set
# CONFIG_LOGIRUMBLEPAD2_FF is not set
# CONFIG_LOGIG940_FF is not set
# CONFIG_LOGIWHEELS_FF is not set
CONFIG_HID_MAGICMOUSE=y
# CONFIG_HID_MALTRON is not set
# CONFIG_HID_MAYFLASH is not set
# CONFIG_HID_REDRAGON is not set
CONFIG_HID_MICROSOFT=m
CONFIG_HID_MONTEREY=m
CONFIG_HID_MULTITOUCH=m
CONFIG_HID_NTI=m
# CONFIG_HID_NTRIG is not set
CONFIG_HID_ORTEK=m
CONFIG_HID_PANTHERLORD=m
# CONFIG_PANTHERLORD_FF is not set
# CONFIG_HID_PENMOUNT is not set
CONFIG_HID_PETALYNX=m
CONFIG_HID_PICOLCD=m
CONFIG_HID_PICOLCD_FB=y
CONFIG_HID_PICOLCD_BACKLIGHT=y
CONFIG_HID_PICOLCD_LCD=y
CONFIG_HID_PICOLCD_LEDS=y
CONFIG_HID_PICOLCD_CIR=y
CONFIG_HID_PLANTRONICS=m
# CONFIG_HID_PLAYSTATION is not set
CONFIG_HID_PRIMAX=m
# CONFIG_HID_RETRODE is not set
# CONFIG_HID_ROCCAT is not set
CONFIG_HID_SAITEK=m
CONFIG_HID_SAMSUNG=m
# CONFIG_HID_SONY is not set
CONFIG_HID_SPEEDLINK=m
# CONFIG_HID_STEAM is not set
CONFIG_HID_STEELSERIES=m
CONFIG_HID_SUNPLUS=m
CONFIG_HID_RMI=m
CONFIG_HID_GREENASIA=m
# CONFIG_GREENASIA_FF is not set
CONFIG_HID_HYPERV_MOUSE=m
CONFIG_HID_SMARTJOYPLUS=m
# CONFIG_SMARTJOYPLUS_FF is not set
CONFIG_HID_TIVO=m
CONFIG_HID_TOPSEED=m
CONFIG_HID_THINGM=m
CONFIG_HID_THRUSTMASTER=m
# CONFIG_THRUSTMASTER_FF is not set
# CONFIG_HID_UDRAW_PS3 is not set
# CONFIG_HID_U2FZERO is not set
# CONFIG_HID_WACOM is not set
CONFIG_HID_WIIMOTE=m
CONFIG_HID_XINMO=m
CONFIG_HID_ZEROPLUS=m
# CONFIG_ZEROPLUS_FF is not set
CONFIG_HID_ZYDACRON=m
CONFIG_HID_SENSOR_HUB=y
CONFIG_HID_SENSOR_CUSTOM_SENSOR=m
CONFIG_HID_ALPS=m
# CONFIG_HID_MCP2221 is not set
# end of Special HID drivers

#
# USB HID support
#
CONFIG_USB_HID=y
# CONFIG_HID_PID is not set
# CONFIG_USB_HIDDEV is not set
# end of USB HID support

#
# I2C HID support
#
# CONFIG_I2C_HID_ACPI is not set
# end of I2C HID support

#
# Intel ISH HID support
#
CONFIG_INTEL_ISH_HID=m
# CONFIG_INTEL_ISH_FIRMWARE_DOWNLOADER is not set
# end of Intel ISH HID support

#
# AMD SFH HID Support
#
# CONFIG_AMD_SFH_HID is not set
# end of AMD SFH HID Support
# end of HID support

CONFIG_USB_OHCI_LITTLE_ENDIAN=y
CONFIG_USB_SUPPORT=y
CONFIG_USB_COMMON=y
# CONFIG_USB_LED_TRIG is not set
# CONFIG_USB_ULPI_BUS is not set
# CONFIG_USB_CONN_GPIO is not set
CONFIG_USB_ARCH_HAS_HCD=y
CONFIG_USB=y
CONFIG_USB_PCI=y
CONFIG_USB_ANNOUNCE_NEW_DEVICES=y

#
# Miscellaneous USB options
#
CONFIG_USB_DEFAULT_PERSIST=y
# CONFIG_USB_FEW_INIT_RETRIES is not set
# CONFIG_USB_DYNAMIC_MINORS is not set
# CONFIG_USB_OTG is not set
# CONFIG_USB_OTG_PRODUCTLIST is not set
CONFIG_USB_LEDS_TRIGGER_USBPORT=y
CONFIG_USB_AUTOSUSPEND_DELAY=2
CONFIG_USB_MON=y

#
# USB Host Controller Drivers
#
# CONFIG_USB_C67X00_HCD is not set
CONFIG_USB_XHCI_HCD=y
# CONFIG_USB_XHCI_DBGCAP is not set
CONFIG_USB_XHCI_PCI=y
# CONFIG_USB_XHCI_PCI_RENESAS is not set
# CONFIG_USB_XHCI_PLATFORM is not set
CONFIG_USB_EHCI_HCD=y
CONFIG_USB_EHCI_ROOT_HUB_TT=y
CONFIG_USB_EHCI_TT_NEWSCHED=y
CONFIG_USB_EHCI_PCI=y
# CONFIG_USB_EHCI_FSL is not set
# CONFIG_USB_EHCI_HCD_PLATFORM is not set
# CONFIG_USB_OXU210HP_HCD is not set
# CONFIG_USB_ISP116X_HCD is not set
# CONFIG_USB_FOTG210_HCD is not set
# CONFIG_USB_MAX3421_HCD is not set
CONFIG_USB_OHCI_HCD=y
CONFIG_USB_OHCI_HCD_PCI=y
# CONFIG_USB_OHCI_HCD_PLATFORM is not set
CONFIG_USB_UHCI_HCD=y
# CONFIG_USB_SL811_HCD is not set
# CONFIG_USB_R8A66597_HCD is not set
# CONFIG_USB_HCD_BCMA is not set
# CONFIG_USB_HCD_TEST_MODE is not set

#
# USB Device Class drivers
#
# CONFIG_USB_ACM is not set
# CONFIG_USB_PRINTER is not set
# CONFIG_USB_WDM is not set
# CONFIG_USB_TMC is not set

#
# NOTE: USB_STORAGE depends on SCSI but BLK_DEV_SD may
#

#
# also be needed; see USB_STORAGE Help for more info
#
CONFIG_USB_STORAGE=m
# CONFIG_USB_STORAGE_DEBUG is not set
# CONFIG_USB_STORAGE_REALTEK is not set
# CONFIG_USB_STORAGE_DATAFAB is not set
# CONFIG_USB_STORAGE_FREECOM is not set
# CONFIG_USB_STORAGE_ISD200 is not set
# CONFIG_USB_STORAGE_USBAT is not set
# CONFIG_USB_STORAGE_SDDR09 is not set
# CONFIG_USB_STORAGE_SDDR55 is not set
# CONFIG_USB_STORAGE_JUMPSHOT is not set
# CONFIG_USB_STORAGE_ALAUDA is not set
# CONFIG_USB_STORAGE_ONETOUCH is not set
# CONFIG_USB_STORAGE_KARMA is not set
# CONFIG_USB_STORAGE_CYPRESS_ATACB is not set
# CONFIG_USB_STORAGE_ENE_UB6250 is not set
# CONFIG_USB_UAS is not set

#
# USB Imaging devices
#
# CONFIG_USB_MDC800 is not set
# CONFIG_USB_MICROTEK is not set
# CONFIG_USBIP_CORE is not set
# CONFIG_USB_CDNS_SUPPORT is not set
# CONFIG_USB_MUSB_HDRC is not set
# CONFIG_USB_DWC3 is not set
# CONFIG_USB_DWC2 is not set
# CONFIG_USB_CHIPIDEA is not set
# CONFIG_USB_ISP1760 is not set

#
# USB port drivers
#
# CONFIG_USB_USS720 is not set
CONFIG_USB_SERIAL=m
CONFIG_USB_SERIAL_GENERIC=y
# CONFIG_USB_SERIAL_SIMPLE is not set
# CONFIG_USB_SERIAL_AIRCABLE is not set
# CONFIG_USB_SERIAL_ARK3116 is not set
# CONFIG_USB_SERIAL_BELKIN is not set
# CONFIG_USB_SERIAL_CH341 is not set
# CONFIG_USB_SERIAL_WHITEHEAT is not set
# CONFIG_USB_SERIAL_DIGI_ACCELEPORT is not set
# CONFIG_USB_SERIAL_CP210X is not set
# CONFIG_USB_SERIAL_CYPRESS_M8 is not set
# CONFIG_USB_SERIAL_EMPEG is not set
# CONFIG_USB_SERIAL_FTDI_SIO is not set
# CONFIG_USB_SERIAL_VISOR is not set
# CONFIG_USB_SERIAL_IPAQ is not set
# CONFIG_USB_SERIAL_IR is not set
# CONFIG_USB_SERIAL_EDGEPORT is not set
# CONFIG_USB_SERIAL_EDGEPORT_TI is not set
# CONFIG_USB_SERIAL_F81232 is not set
# CONFIG_USB_SERIAL_F8153X is not set
# CONFIG_USB_SERIAL_GARMIN is not set
# CONFIG_USB_SERIAL_IPW is not set
# CONFIG_USB_SERIAL_IUU is not set
# CONFIG_USB_SERIAL_KEYSPAN_PDA is not set
# CONFIG_USB_SERIAL_KEYSPAN is not set
# CONFIG_USB_SERIAL_KLSI is not set
# CONFIG_USB_SERIAL_KOBIL_SCT is not set
# CONFIG_USB_SERIAL_MCT_U232 is not set
# CONFIG_USB_SERIAL_METRO is not set
# CONFIG_USB_SERIAL_MOS7720 is not set
# CONFIG_USB_SERIAL_MOS7840 is not set
# CONFIG_USB_SERIAL_MXUPORT is not set
# CONFIG_USB_SERIAL_NAVMAN is not set
# CONFIG_USB_SERIAL_PL2303 is not set
# CONFIG_USB_SERIAL_OTI6858 is not set
# CONFIG_USB_SERIAL_QCAUX is not set
# CONFIG_USB_SERIAL_QUALCOMM is not set
# CONFIG_USB_SERIAL_SPCP8X5 is not set
# CONFIG_USB_SERIAL_SAFE is not set
# CONFIG_USB_SERIAL_SIERRAWIRELESS is not set
# CONFIG_USB_SERIAL_SYMBOL is not set
# CONFIG_USB_SERIAL_TI is not set
# CONFIG_USB_SERIAL_CYBERJACK is not set
# CONFIG_USB_SERIAL_OPTION is not set
# CONFIG_USB_SERIAL_OMNINET is not set
# CONFIG_USB_SERIAL_OPTICON is not set
# CONFIG_USB_SERIAL_XSENS_MT is not set
# CONFIG_USB_SERIAL_WISHBONE is not set
# CONFIG_USB_SERIAL_SSU100 is not set
# CONFIG_USB_SERIAL_QT2 is not set
# CONFIG_USB_SERIAL_UPD78F0730 is not set
# CONFIG_USB_SERIAL_XR is not set
CONFIG_USB_SERIAL_DEBUG=m

#
# USB Miscellaneous drivers
#
# CONFIG_USB_EMI62 is not set
# CONFIG_USB_EMI26 is not set
# CONFIG_USB_ADUTUX is not set
# CONFIG_USB_SEVSEG is not set
# CONFIG_USB_LEGOTOWER is not set
# CONFIG_USB_LCD is not set
# CONFIG_USB_CYPRESS_CY7C63 is not set
# CONFIG_USB_CYTHERM is not set
# CONFIG_USB_IDMOUSE is not set
# CONFIG_USB_FTDI_ELAN is not set
# CONFIG_USB_APPLEDISPLAY is not set
# CONFIG_APPLE_MFI_FASTCHARGE is not set
# CONFIG_USB_SISUSBVGA is not set
# CONFIG_USB_LD is not set
# CONFIG_USB_TRANCEVIBRATOR is not set
# CONFIG_USB_IOWARRIOR is not set
# CONFIG_USB_TEST is not set
# CONFIG_USB_EHSET_TEST_FIXTURE is not set
# CONFIG_USB_ISIGHTFW is not set
# CONFIG_USB_YUREX is not set
# CONFIG_USB_EZUSB_FX2 is not set
# CONFIG_USB_HUB_USB251XB is not set
# CONFIG_USB_HSIC_USB3503 is not set
# CONFIG_USB_HSIC_USB4604 is not set
# CONFIG_USB_LINK_LAYER_TEST is not set
# CONFIG_USB_CHAOSKEY is not set
# CONFIG_USB_ATM is not set

#
# USB Physical Layer drivers
#
# CONFIG_NOP_USB_XCEIV is not set
# CONFIG_USB_GPIO_VBUS is not set
# CONFIG_USB_ISP1301 is not set
# end of USB Physical Layer drivers

# CONFIG_USB_GADGET is not set
CONFIG_TYPEC=y
# CONFIG_TYPEC_TCPM is not set
CONFIG_TYPEC_UCSI=y
# CONFIG_UCSI_CCG is not set
CONFIG_UCSI_ACPI=y
# CONFIG_TYPEC_TPS6598X is not set
# CONFIG_TYPEC_STUSB160X is not set

#
# USB Type-C Multiplexer/DeMultiplexer Switch support
#
# CONFIG_TYPEC_MUX_PI3USB30532 is not set
# end of USB Type-C Multiplexer/DeMultiplexer Switch support

#
# USB Type-C Alternate Mode drivers
#
# CONFIG_TYPEC_DP_ALTMODE is not set
# end of USB Type-C Alternate Mode drivers

# CONFIG_USB_ROLE_SWITCH is not set
CONFIG_MMC=m
CONFIG_MMC_BLOCK=m
CONFIG_MMC_BLOCK_MINORS=8
CONFIG_SDIO_UART=m
# CONFIG_MMC_TEST is not set

#
# MMC/SD/SDIO Host Controller Drivers
#
# CONFIG_MMC_DEBUG is not set
CONFIG_MMC_SDHCI=m
CONFIG_MMC_SDHCI_IO_ACCESSORS=y
CONFIG_MMC_SDHCI_PCI=m
CONFIG_MMC_RICOH_MMC=y
CONFIG_MMC_SDHCI_ACPI=m
CONFIG_MMC_SDHCI_PLTFM=m
# CONFIG_MMC_SDHCI_F_SDH30 is not set
# CONFIG_MMC_WBSD is not set
# CONFIG_MMC_TIFM_SD is not set
# CONFIG_MMC_SPI is not set
# CONFIG_MMC_CB710 is not set
# CONFIG_MMC_VIA_SDMMC is not set
# CONFIG_MMC_VUB300 is not set
# CONFIG_MMC_USHC is not set
# CONFIG_MMC_USDHI6ROL0 is not set
# CONFIG_MMC_REALTEK_PCI is not set
CONFIG_MMC_CQHCI=m
# CONFIG_MMC_HSQ is not set
# CONFIG_MMC_TOSHIBA_PCI is not set
# CONFIG_MMC_MTK is not set
# CONFIG_MMC_SDHCI_XENON is not set
# CONFIG_MEMSTICK is not set
CONFIG_NEW_LEDS=y
CONFIG_LEDS_CLASS=y
# CONFIG_LEDS_CLASS_FLASH is not set
# CONFIG_LEDS_CLASS_MULTICOLOR is not set
# CONFIG_LEDS_BRIGHTNESS_HW_CHANGED is not set

#
# LED drivers
#
# CONFIG_LEDS_APU is not set
CONFIG_LEDS_LM3530=m
# CONFIG_LEDS_LM3532 is not set
# CONFIG_LEDS_LM3642 is not set
# CONFIG_LEDS_PCA9532 is not set
# CONFIG_LEDS_GPIO is not set
CONFIG_LEDS_LP3944=m
# CONFIG_LEDS_LP3952 is not set
# CONFIG_LEDS_LP50XX is not set
CONFIG_LEDS_CLEVO_MAIL=m
# CONFIG_LEDS_PCA955X is not set
# CONFIG_LEDS_PCA963X is not set
# CONFIG_LEDS_DAC124S085 is not set
# CONFIG_LEDS_PWM is not set
# CONFIG_LEDS_BD2802 is not set
CONFIG_LEDS_INTEL_SS4200=m
# CONFIG_LEDS_TCA6507 is not set
# CONFIG_LEDS_TLC591XX is not set
# CONFIG_LEDS_LM355x is not set

#
# LED driver for blink(1) USB RGB LED is under Special HID drivers (HID_THINGM)
#
CONFIG_LEDS_BLINKM=m
CONFIG_LEDS_MLXCPLD=m
# CONFIG_LEDS_MLXREG is not set
# CONFIG_LEDS_USER is not set
# CONFIG_LEDS_NIC78BX is not set
# CONFIG_LEDS_TI_LMU_COMMON is not set

#
# Flash and Torch LED drivers
#

#
# LED Triggers
#
CONFIG_LEDS_TRIGGERS=y
CONFIG_LEDS_TRIGGER_TIMER=m
CONFIG_LEDS_TRIGGER_ONESHOT=m
# CONFIG_LEDS_TRIGGER_DISK is not set
CONFIG_LEDS_TRIGGER_HEARTBEAT=m
CONFIG_LEDS_TRIGGER_BACKLIGHT=m
# CONFIG_LEDS_TRIGGER_CPU is not set
# CONFIG_LEDS_TRIGGER_ACTIVITY is not set
CONFIG_LEDS_TRIGGER_GPIO=m
CONFIG_LEDS_TRIGGER_DEFAULT_ON=m

#
# iptables trigger is under Netfilter config (LED target)
#
CONFIG_LEDS_TRIGGER_TRANSIENT=m
CONFIG_LEDS_TRIGGER_CAMERA=m
# CONFIG_LEDS_TRIGGER_PANIC is not set
# CONFIG_LEDS_TRIGGER_NETDEV is not set
# CONFIG_LEDS_TRIGGER_PATTERN is not set
CONFIG_LEDS_TRIGGER_AUDIO=m
# CONFIG_LEDS_TRIGGER_TTY is not set

#
# LED Blink
#
# CONFIG_LEDS_BLINK is not set
# CONFIG_ACCESSIBILITY is not set
CONFIG_INFINIBAND=m
CONFIG_INFINIBAND_USER_MAD=m
CONFIG_INFINIBAND_USER_ACCESS=m
CONFIG_INFINIBAND_USER_MEM=y
CONFIG_INFINIBAND_ON_DEMAND_PAGING=y
CONFIG_INFINIBAND_ADDR_TRANS=y
CONFIG_INFINIBAND_ADDR_TRANS_CONFIGFS=y
CONFIG_INFINIBAND_VIRT_DMA=y
# CONFIG_INFINIBAND_MTHCA is not set
# CONFIG_INFINIBAND_EFA is not set
# CONFIG_INFINIBAND_I40IW is not set
# CONFIG_MLX4_INFINIBAND is not set
# CONFIG_INFINIBAND_OCRDMA is not set
# CONFIG_INFINIBAND_USNIC is not set
# CONFIG_INFINIBAND_BNXT_RE is not set
# CONFIG_INFINIBAND_RDMAVT is not set
CONFIG_RDMA_RXE=m
CONFIG_RDMA_SIW=m
CONFIG_INFINIBAND_IPOIB=m
# CONFIG_INFINIBAND_IPOIB_CM is not set
CONFIG_INFINIBAND_IPOIB_DEBUG=y
# CONFIG_INFINIBAND_IPOIB_DEBUG_DATA is not set
CONFIG_INFINIBAND_SRP=m
CONFIG_INFINIBAND_SRPT=m
# CONFIG_INFINIBAND_ISER is not set
# CONFIG_INFINIBAND_ISERT is not set
# CONFIG_INFINIBAND_RTRS_CLIENT is not set
# CONFIG_INFINIBAND_RTRS_SERVER is not set
# CONFIG_INFINIBAND_OPA_VNIC is not set
CONFIG_EDAC_ATOMIC_SCRUB=y
CONFIG_EDAC_SUPPORT=y
CONFIG_EDAC=y
CONFIG_EDAC_LEGACY_SYSFS=y
# CONFIG_EDAC_DEBUG is not set
CONFIG_EDAC_DECODE_MCE=m
CONFIG_EDAC_GHES=y
CONFIG_EDAC_AMD64=m
CONFIG_EDAC_E752X=m
CONFIG_EDAC_I82975X=m
CONFIG_EDAC_I3000=m
CONFIG_EDAC_I3200=m
CONFIG_EDAC_IE31200=m
CONFIG_EDAC_X38=m
CONFIG_EDAC_I5400=m
CONFIG_EDAC_I7CORE=m
CONFIG_EDAC_I5000=m
CONFIG_EDAC_I5100=m
CONFIG_EDAC_I7300=m
CONFIG_EDAC_SBRIDGE=m
CONFIG_EDAC_SKX=m
# CONFIG_EDAC_I10NM is not set
CONFIG_EDAC_PND2=m
# CONFIG_EDAC_IGEN6 is not set
CONFIG_RTC_LIB=y
CONFIG_RTC_MC146818_LIB=y
CONFIG_RTC_CLASS=y
CONFIG_RTC_HCTOSYS=y
CONFIG_RTC_HCTOSYS_DEVICE="rtc0"
# CONFIG_RTC_SYSTOHC is not set
# CONFIG_RTC_DEBUG is not set
CONFIG_RTC_NVMEM=y

#
# RTC interfaces
#
CONFIG_RTC_INTF_SYSFS=y
CONFIG_RTC_INTF_PROC=y
CONFIG_RTC_INTF_DEV=y
# CONFIG_RTC_INTF_DEV_UIE_EMUL is not set
# CONFIG_RTC_DRV_TEST is not set

#
# I2C RTC drivers
#
# CONFIG_RTC_DRV_ABB5ZES3 is not set
# CONFIG_RTC_DRV_ABEOZ9 is not set
# CONFIG_RTC_DRV_ABX80X is not set
CONFIG_RTC_DRV_DS1307=m
# CONFIG_RTC_DRV_DS1307_CENTURY is not set
CONFIG_RTC_DRV_DS1374=m
# CONFIG_RTC_DRV_DS1374_WDT is not set
CONFIG_RTC_DRV_DS1672=m
CONFIG_RTC_DRV_MAX6900=m
CONFIG_RTC_DRV_RS5C372=m
CONFIG_RTC_DRV_ISL1208=m
CONFIG_RTC_DRV_ISL12022=m
CONFIG_RTC_DRV_X1205=m
CONFIG_RTC_DRV_PCF8523=m
# CONFIG_RTC_DRV_PCF85063 is not set
# CONFIG_RTC_DRV_PCF85363 is not set
CONFIG_RTC_DRV_PCF8563=m
CONFIG_RTC_DRV_PCF8583=m
CONFIG_RTC_DRV_M41T80=m
CONFIG_RTC_DRV_M41T80_WDT=y
CONFIG_RTC_DRV_BQ32K=m
# CONFIG_RTC_DRV_S35390A is not set
CONFIG_RTC_DRV_FM3130=m
# CONFIG_RTC_DRV_RX8010 is not set
CONFIG_RTC_DRV_RX8581=m
CONFIG_RTC_DRV_RX8025=m
CONFIG_RTC_DRV_EM3027=m
# CONFIG_RTC_DRV_RV3028 is not set
# CONFIG_RTC_DRV_RV3032 is not set
# CONFIG_RTC_DRV_RV8803 is not set
# CONFIG_RTC_DRV_SD3078 is not set

#
# SPI RTC drivers
#
# CONFIG_RTC_DRV_M41T93 is not set
# CONFIG_RTC_DRV_M41T94 is not set
# CONFIG_RTC_DRV_DS1302 is not set
# CONFIG_RTC_DRV_DS1305 is not set
# CONFIG_RTC_DRV_DS1343 is not set
# CONFIG_RTC_DRV_DS1347 is not set
# CONFIG_RTC_DRV_DS1390 is not set
# CONFIG_RTC_DRV_MAX6916 is not set
# CONFIG_RTC_DRV_R9701 is not set
CONFIG_RTC_DRV_RX4581=m
# CONFIG_RTC_DRV_RS5C348 is not set
# CONFIG_RTC_DRV_MAX6902 is not set
# CONFIG_RTC_DRV_PCF2123 is not set
# CONFIG_RTC_DRV_MCP795 is not set
CONFIG_RTC_I2C_AND_SPI=y

#
# SPI and I2C RTC drivers
#
CONFIG_RTC_DRV_DS3232=m
CONFIG_RTC_DRV_DS3232_HWMON=y
# CONFIG_RTC_DRV_PCF2127 is not set
CONFIG_RTC_DRV_RV3029C2=m
# CONFIG_RTC_DRV_RV3029_HWMON is not set
# CONFIG_RTC_DRV_RX6110 is not set

#
# Platform RTC drivers
#
CONFIG_RTC_DRV_CMOS=y
CONFIG_RTC_DRV_DS1286=m
CONFIG_RTC_DRV_DS1511=m
CONFIG_RTC_DRV_DS1553=m
# CONFIG_RTC_DRV_DS1685_FAMILY is not set
CONFIG_RTC_DRV_DS1742=m
CONFIG_RTC_DRV_DS2404=m
CONFIG_RTC_DRV_STK17TA8=m
# CONFIG_RTC_DRV_M48T86 is not set
CONFIG_RTC_DRV_M48T35=m
CONFIG_RTC_DRV_M48T59=m
CONFIG_RTC_DRV_MSM6242=m
CONFIG_RTC_DRV_BQ4802=m
CONFIG_RTC_DRV_RP5C01=m
CONFIG_RTC_DRV_V3020=m

#
# on-CPU RTC drivers
#
# CONFIG_RTC_DRV_FTRTC010 is not set

#
# HID Sensor RTC drivers
#
CONFIG_DMADEVICES=y
# CONFIG_DMADEVICES_DEBUG is not set

#
# DMA Devices
#
CONFIG_DMA_ENGINE=y
CONFIG_DMA_VIRTUAL_CHANNELS=y
CONFIG_DMA_ACPI=y
# CONFIG_ALTERA_MSGDMA is not set
CONFIG_INTEL_IDMA64=m
# CONFIG_INTEL_IDXD is not set
CONFIG_INTEL_IOATDMA=m
# CONFIG_PLX_DMA is not set
# CONFIG_XILINX_ZYNQMP_DPDMA is not set
# CONFIG_QCOM_HIDMA_MGMT is not set
# CONFIG_QCOM_HIDMA is not set
CONFIG_DW_DMAC_CORE=y
CONFIG_DW_DMAC=m
CONFIG_DW_DMAC_PCI=y
# CONFIG_DW_EDMA is not set
# CONFIG_DW_EDMA_PCIE is not set
CONFIG_HSU_DMA=y
# CONFIG_SF_PDMA is not set
# CONFIG_INTEL_LDMA is not set

#
# DMA Clients
#
CONFIG_ASYNC_TX_DMA=y
CONFIG_DMATEST=m
CONFIG_DMA_ENGINE_RAID=y

#
# DMABUF options
#
CONFIG_SYNC_FILE=y
# CONFIG_SW_SYNC is not set
# CONFIG_UDMABUF is not set
# CONFIG_DMABUF_MOVE_NOTIFY is not set
# CONFIG_DMABUF_DEBUG is not set
# CONFIG_DMABUF_SELFTESTS is not set
# CONFIG_DMABUF_HEAPS is not set
# end of DMABUF options

CONFIG_DCA=m
# CONFIG_AUXDISPLAY is not set
# CONFIG_PANEL is not set
CONFIG_UIO=m
CONFIG_UIO_CIF=m
CONFIG_UIO_PDRV_GENIRQ=m
# CONFIG_UIO_DMEM_GENIRQ is not set
CONFIG_UIO_AEC=m
CONFIG_UIO_SERCOS3=m
CONFIG_UIO_PCI_GENERIC=m
# CONFIG_UIO_NETX is not set
# CONFIG_UIO_PRUSS is not set
# CONFIG_UIO_MF624 is not set
CONFIG_UIO_HV_GENERIC=m
CONFIG_VFIO_IOMMU_TYPE1=m
CONFIG_VFIO_VIRQFD=m
CONFIG_VFIO=m
CONFIG_VFIO_NOIOMMU=y
CONFIG_VFIO_PCI=m
# CONFIG_VFIO_PCI_VGA is not set
CONFIG_VFIO_PCI_MMAP=y
CONFIG_VFIO_PCI_INTX=y
# CONFIG_VFIO_PCI_IGD is not set
CONFIG_VFIO_MDEV=m
CONFIG_VFIO_MDEV_DEVICE=m
CONFIG_IRQ_BYPASS_MANAGER=m
# CONFIG_VIRT_DRIVERS is not set
CONFIG_VIRTIO=y
CONFIG_VIRTIO_PCI_LIB=y
CONFIG_VIRTIO_MENU=y
CONFIG_VIRTIO_PCI=y
CONFIG_VIRTIO_PCI_LEGACY=y
# CONFIG_VIRTIO_PMEM is not set
CONFIG_VIRTIO_BALLOON=m
CONFIG_VIRTIO_MEM=m
CONFIG_VIRTIO_INPUT=m
# CONFIG_VIRTIO_MMIO is not set
CONFIG_VIRTIO_DMA_SHARED_BUFFER=m
# CONFIG_VDPA is not set
CONFIG_VHOST_IOTLB=m
CONFIG_VHOST=m
CONFIG_VHOST_MENU=y
CONFIG_VHOST_NET=m
# CONFIG_VHOST_SCSI is not set
CONFIG_VHOST_VSOCK=m
# CONFIG_VHOST_CROSS_ENDIAN_LEGACY is not set

#
# Microsoft Hyper-V guest support
#
CONFIG_HYPERV=m
CONFIG_HYPERV_TIMER=y
CONFIG_HYPERV_UTILS=m
CONFIG_HYPERV_BALLOON=m
# end of Microsoft Hyper-V guest support

#
# Xen driver support
#
# CONFIG_XEN_BALLOON is not set
CONFIG_XEN_DEV_EVTCHN=m
# CONFIG_XEN_BACKEND is not set
CONFIG_XENFS=m
CONFIG_XEN_COMPAT_XENFS=y
CONFIG_XEN_SYS_HYPERVISOR=y
CONFIG_XEN_XENBUS_FRONTEND=y
# CONFIG_XEN_GNTDEV is not set
# CONFIG_XEN_GRANT_DEV_ALLOC is not set
# CONFIG_XEN_GRANT_DMA_ALLOC is not set
CONFIG_SWIOTLB_XEN=y
# CONFIG_XEN_PVCALLS_FRONTEND is not set
CONFIG_XEN_PRIVCMD=m
CONFIG_XEN_EFI=y
CONFIG_XEN_AUTO_XLATE=y
CONFIG_XEN_ACPI=y
# CONFIG_XEN_UNPOPULATED_ALLOC is not set
# end of Xen driver support

# CONFIG_GREYBUS is not set
# CONFIG_STAGING is not set
CONFIG_X86_PLATFORM_DEVICES=y
CONFIG_ACPI_WMI=m
CONFIG_WMI_BMOF=m
# CONFIG_HUAWEI_WMI is not set
# CONFIG_UV_SYSFS is not set
# CONFIG_INTEL_WMI_SBL_FW_UPDATE is not set
CONFIG_INTEL_WMI_THUNDERBOLT=m
CONFIG_MXM_WMI=m
# CONFIG_PEAQ_WMI is not set
# CONFIG_XIAOMI_WMI is not set
CONFIG_ACERHDF=m
# CONFIG_ACER_WIRELESS is not set
CONFIG_ACER_WMI=m
# CONFIG_AMD_PMC is not set
CONFIG_APPLE_GMUX=m
CONFIG_ASUS_LAPTOP=m
# CONFIG_ASUS_WIRELESS is not set
CONFIG_ASUS_WMI=m
CONFIG_ASUS_NB_WMI=m
CONFIG_EEEPC_LAPTOP=m
CONFIG_EEEPC_WMI=m
# CONFIG_X86_PLATFORM_DRIVERS_DELL is not set
CONFIG_AMILO_RFKILL=m
CONFIG_FUJITSU_LAPTOP=m
CONFIG_FUJITSU_TABLET=m
# CONFIG_GPD_POCKET_FAN is not set
CONFIG_HP_ACCEL=m
CONFIG_HP_WIRELESS=m
CONFIG_HP_WMI=m
# CONFIG_IBM_RTL is not set
CONFIG_IDEAPAD_LAPTOP=m
CONFIG_SENSORS_HDAPS=m
CONFIG_THINKPAD_ACPI=m
# CONFIG_THINKPAD_ACPI_DEBUGFACILITIES is not set
# CONFIG_THINKPAD_ACPI_DEBUG is not set
# CONFIG_THINKPAD_ACPI_UNSAFE_LEDS is not set
CONFIG_THINKPAD_ACPI_VIDEO=y
CONFIG_THINKPAD_ACPI_HOTKEY_POLL=y
# CONFIG_INTEL_ATOMISP2_PM is not set
CONFIG_INTEL_HID_EVENT=m
# CONFIG_INTEL_INT0002_VGPIO is not set
# CONFIG_INTEL_MENLOW is not set
CONFIG_INTEL_OAKTRAIL=m
CONFIG_INTEL_VBTN=m
CONFIG_MSI_LAPTOP=m
CONFIG_MSI_WMI=m
# CONFIG_PCENGINES_APU2 is not set
CONFIG_SAMSUNG_LAPTOP=m
CONFIG_SAMSUNG_Q10=m
CONFIG_TOSHIBA_BT_RFKILL=m
# CONFIG_TOSHIBA_HAPS is not set
# CONFIG_TOSHIBA_WMI is not set
CONFIG_ACPI_CMPC=m
CONFIG_COMPAL_LAPTOP=m
# CONFIG_LG_LAPTOP is not set
CONFIG_PANASONIC_LAPTOP=m
CONFIG_SONY_LAPTOP=m
CONFIG_SONYPI_COMPAT=y
# CONFIG_SYSTEM76_ACPI is not set
CONFIG_TOPSTAR_LAPTOP=m
# CONFIG_I2C_MULTI_INSTANTIATE is not set
CONFIG_MLX_PLATFORM=m
CONFIG_INTEL_IPS=m
CONFIG_INTEL_RST=m
# CONFIG_INTEL_SMARTCONNECT is not set

#
# Intel Speed Select Technology interface support
#
# CONFIG_INTEL_SPEED_SELECT_INTERFACE is not set
# end of Intel Speed Select Technology interface support

CONFIG_INTEL_TURBO_MAX_3=y
# CONFIG_INTEL_UNCORE_FREQ_CONTROL is not set
CONFIG_INTEL_PMC_CORE=m
# CONFIG_INTEL_PUNIT_IPC is not set
# CONFIG_INTEL_SCU_PCI is not set
# CONFIG_INTEL_SCU_PLATFORM is not set
CONFIG_PMC_ATOM=y
# CONFIG_CHROME_PLATFORMS is not set
CONFIG_MELLANOX_PLATFORM=y
CONFIG_MLXREG_HOTPLUG=m
# CONFIG_MLXREG_IO is not set
CONFIG_SURFACE_PLATFORMS=y
# CONFIG_SURFACE3_WMI is not set
# CONFIG_SURFACE_3_POWER_OPREGION is not set
# CONFIG_SURFACE_GPE is not set
# CONFIG_SURFACE_HOTPLUG is not set
# CONFIG_SURFACE_PRO3_BUTTON is not set
CONFIG_HAVE_CLK=y
CONFIG_CLKDEV_LOOKUP=y
CONFIG_HAVE_CLK_PREPARE=y
CONFIG_COMMON_CLK=y
# CONFIG_COMMON_CLK_MAX9485 is not set
# CONFIG_COMMON_CLK_SI5341 is not set
# CONFIG_COMMON_CLK_SI5351 is not set
# CONFIG_COMMON_CLK_SI544 is not set
# CONFIG_COMMON_CLK_CDCE706 is not set
# CONFIG_COMMON_CLK_CS2000_CP is not set
# CONFIG_COMMON_CLK_PWM is not set
# CONFIG_XILINX_VCU is not set
CONFIG_HWSPINLOCK=y

#
# Clock Source drivers
#
CONFIG_CLKEVT_I8253=y
CONFIG_I8253_LOCK=y
CONFIG_CLKBLD_I8253=y
# end of Clock Source drivers

CONFIG_MAILBOX=y
CONFIG_PCC=y
# CONFIG_ALTERA_MBOX is not set
CONFIG_IOMMU_IOVA=y
CONFIG_IOASID=y
CONFIG_IOMMU_API=y
CONFIG_IOMMU_SUPPORT=y

#
# Generic IOMMU Pagetable Support
#
CONFIG_IOMMU_IO_PGTABLE=y
# end of Generic IOMMU Pagetable Support

# CONFIG_IOMMU_DEBUGFS is not set
# CONFIG_IOMMU_DEFAULT_PASSTHROUGH is not set
CONFIG_IOMMU_DMA=y
CONFIG_AMD_IOMMU=y
CONFIG_AMD_IOMMU_V2=m
CONFIG_DMAR_TABLE=y
CONFIG_INTEL_IOMMU=y
# CONFIG_INTEL_IOMMU_SVM is not set
# CONFIG_INTEL_IOMMU_DEFAULT_ON is not set
CONFIG_INTEL_IOMMU_FLOPPY_WA=y
# CONFIG_INTEL_IOMMU_SCALABLE_MODE_DEFAULT_ON is not set
CONFIG_IRQ_REMAP=y
CONFIG_HYPERV_IOMMU=y

#
# Remoteproc drivers
#
# CONFIG_REMOTEPROC is not set
# end of Remoteproc drivers

#
# Rpmsg drivers
#
# CONFIG_RPMSG_QCOM_GLINK_RPM is not set
# CONFIG_RPMSG_VIRTIO is not set
# end of Rpmsg drivers

# CONFIG_SOUNDWIRE is not set

#
# SOC (System On Chip) specific Drivers
#

#
# Amlogic SoC drivers
#
# end of Amlogic SoC drivers

#
# Broadcom SoC drivers
#
# end of Broadcom SoC drivers

#
# NXP/Freescale QorIQ SoC drivers
#
# end of NXP/Freescale QorIQ SoC drivers

#
# i.MX SoC drivers
#
# end of i.MX SoC drivers

#
# Enable LiteX SoC Builder specific drivers
#
# end of Enable LiteX SoC Builder specific drivers

#
# Qualcomm SoC drivers
#
# end of Qualcomm SoC drivers

# CONFIG_SOC_TI is not set

#
# Xilinx SoC drivers
#
# end of Xilinx SoC drivers
# end of SOC (System On Chip) specific Drivers

# CONFIG_PM_DEVFREQ is not set
# CONFIG_EXTCON is not set
# CONFIG_MEMORY is not set
# CONFIG_IIO is not set
CONFIG_NTB=m
# CONFIG_NTB_MSI is not set
# CONFIG_NTB_AMD is not set
# CONFIG_NTB_IDT is not set
# CONFIG_NTB_INTEL is not set
# CONFIG_NTB_EPF is not set
# CONFIG_NTB_SWITCHTEC is not set
# CONFIG_NTB_PINGPONG is not set
# CONFIG_NTB_TOOL is not set
# CONFIG_NTB_PERF is not set
# CONFIG_NTB_TRANSPORT is not set
# CONFIG_VME_BUS is not set
CONFIG_PWM=y
CONFIG_PWM_SYSFS=y
# CONFIG_PWM_DEBUG is not set
# CONFIG_PWM_DWC is not set
CONFIG_PWM_LPSS=m
CONFIG_PWM_LPSS_PCI=m
CONFIG_PWM_LPSS_PLATFORM=m
# CONFIG_PWM_PCA9685 is not set

#
# IRQ chip support
#
# end of IRQ chip support

# CONFIG_IPACK_BUS is not set
# CONFIG_RESET_CONTROLLER is not set

#
# PHY Subsystem
#
# CONFIG_GENERIC_PHY is not set
# CONFIG_USB_LGM_PHY is not set
# CONFIG_BCM_KONA_USB2_PHY is not set
# CONFIG_PHY_PXA_28NM_HSIC is not set
# CONFIG_PHY_PXA_28NM_USB2 is not set
# CONFIG_PHY_INTEL_LGM_EMMC is not set
# end of PHY Subsystem

CONFIG_POWERCAP=y
CONFIG_INTEL_RAPL_CORE=m
CONFIG_INTEL_RAPL=m
# CONFIG_IDLE_INJECT is not set
# CONFIG_DTPM is not set
# CONFIG_MCB is not set

#
# Performance monitor support
#
# end of Performance monitor support

CONFIG_RAS=y
# CONFIG_RAS_CEC is not set
# CONFIG_USB4 is not set

#
# Android
#
# CONFIG_ANDROID is not set
# end of Android

CONFIG_LIBNVDIMM=m
CONFIG_BLK_DEV_PMEM=m
CONFIG_ND_BLK=m
CONFIG_ND_CLAIM=y
CONFIG_ND_BTT=m
CONFIG_BTT=y
CONFIG_ND_PFN=m
CONFIG_NVDIMM_PFN=y
CONFIG_NVDIMM_DAX=y
CONFIG_NVDIMM_KEYS=y
CONFIG_DAX_DRIVER=y
CONFIG_DAX=y
CONFIG_DEV_DAX=m
CONFIG_DEV_DAX_PMEM=m
CONFIG_DEV_DAX_KMEM=m
CONFIG_DEV_DAX_PMEM_COMPAT=m
CONFIG_NVMEM=y
CONFIG_NVMEM_SYSFS=y
# CONFIG_NVMEM_RMEM is not set

#
# HW tracing support
#
CONFIG_STM=m
# CONFIG_STM_PROTO_BASIC is not set
# CONFIG_STM_PROTO_SYS_T is not set
CONFIG_STM_DUMMY=m
CONFIG_STM_SOURCE_CONSOLE=m
CONFIG_STM_SOURCE_HEARTBEAT=m
CONFIG_STM_SOURCE_FTRACE=m
CONFIG_INTEL_TH=m
CONFIG_INTEL_TH_PCI=m
CONFIG_INTEL_TH_ACPI=m
CONFIG_INTEL_TH_GTH=m
CONFIG_INTEL_TH_STH=m
CONFIG_INTEL_TH_MSU=m
CONFIG_INTEL_TH_PTI=m
# CONFIG_INTEL_TH_DEBUG is not set
# end of HW tracing support

# CONFIG_FPGA is not set
# CONFIG_TEE is not set
# CONFIG_UNISYS_VISORBUS is not set
# CONFIG_SIOX is not set
# CONFIG_SLIMBUS is not set
# CONFIG_INTERCONNECT is not set
# CONFIG_COUNTER is not set
# CONFIG_MOST is not set
# end of Device Drivers

#
# File systems
#
CONFIG_DCACHE_WORD_ACCESS=y
# CONFIG_VALIDATE_FS_PARSER is not set
CONFIG_FS_IOMAP=y
CONFIG_EXT2_FS=m
CONFIG_EXT2_FS_XATTR=y
CONFIG_EXT2_FS_POSIX_ACL=y
CONFIG_EXT2_FS_SECURITY=y
# CONFIG_EXT3_FS is not set
CONFIG_EXT4_FS=y
CONFIG_EXT4_FS_POSIX_ACL=y
CONFIG_EXT4_FS_SECURITY=y
# CONFIG_EXT4_DEBUG is not set
CONFIG_EXT4_KUNIT_TESTS=m
CONFIG_JBD2=y
# CONFIG_JBD2_DEBUG is not set
CONFIG_FS_MBCACHE=y
# CONFIG_REISERFS_FS is not set
# CONFIG_JFS_FS is not set
CONFIG_XFS_FS=m
CONFIG_XFS_SUPPORT_V4=y
CONFIG_XFS_QUOTA=y
CONFIG_XFS_POSIX_ACL=y
CONFIG_XFS_RT=y
CONFIG_XFS_ONLINE_SCRUB=y
CONFIG_XFS_ONLINE_REPAIR=y
CONFIG_XFS_DEBUG=y
CONFIG_XFS_ASSERT_FATAL=y
CONFIG_GFS2_FS=m
CONFIG_GFS2_FS_LOCKING_DLM=y
CONFIG_OCFS2_FS=m
CONFIG_OCFS2_FS_O2CB=m
CONFIG_OCFS2_FS_USERSPACE_CLUSTER=m
CONFIG_OCFS2_FS_STATS=y
CONFIG_OCFS2_DEBUG_MASKLOG=y
# CONFIG_OCFS2_DEBUG_FS is not set
CONFIG_BTRFS_FS=m
CONFIG_BTRFS_FS_POSIX_ACL=y
# CONFIG_BTRFS_FS_CHECK_INTEGRITY is not set
# CONFIG_BTRFS_FS_RUN_SANITY_TESTS is not set
# CONFIG_BTRFS_DEBUG is not set
# CONFIG_BTRFS_ASSERT is not set
# CONFIG_BTRFS_FS_REF_VERIFY is not set
# CONFIG_NILFS2_FS is not set
CONFIG_F2FS_FS=m
CONFIG_F2FS_STAT_FS=y
CONFIG_F2FS_FS_XATTR=y
CONFIG_F2FS_FS_POSIX_ACL=y
CONFIG_F2FS_FS_SECURITY=y
# CONFIG_F2FS_CHECK_FS is not set
# CONFIG_F2FS_FAULT_INJECTION is not set
# CONFIG_F2FS_FS_COMPRESSION is not set
# CONFIG_ZONEFS_FS is not set
CONFIG_FS_DAX=y
CONFIG_FS_DAX_PMD=y
CONFIG_FS_POSIX_ACL=y
CONFIG_EXPORTFS=y
CONFIG_EXPORTFS_BLOCK_OPS=y
CONFIG_FILE_LOCKING=y
CONFIG_MANDATORY_FILE_LOCKING=y
CONFIG_FS_ENCRYPTION=y
CONFIG_FS_ENCRYPTION_ALGS=y
# CONFIG_FS_VERITY is not set
CONFIG_FSNOTIFY=y
CONFIG_DNOTIFY=y
CONFIG_INOTIFY_USER=y
CONFIG_FANOTIFY=y
CONFIG_FANOTIFY_ACCESS_PERMISSIONS=y
CONFIG_QUOTA=y
CONFIG_QUOTA_NETLINK_INTERFACE=y
CONFIG_PRINT_QUOTA_WARNING=y
# CONFIG_QUOTA_DEBUG is not set
CONFIG_QUOTA_TREE=y
# CONFIG_QFMT_V1 is not set
CONFIG_QFMT_V2=y
CONFIG_QUOTACTL=y
CONFIG_AUTOFS4_FS=y
CONFIG_AUTOFS_FS=y
CONFIG_FUSE_FS=m
CONFIG_CUSE=m
# CONFIG_VIRTIO_FS is not set
CONFIG_OVERLAY_FS=m
# CONFIG_OVERLAY_FS_REDIRECT_DIR is not set
# CONFIG_OVERLAY_FS_REDIRECT_ALWAYS_FOLLOW is not set
# CONFIG_OVERLAY_FS_INDEX is not set
# CONFIG_OVERLAY_FS_XINO_AUTO is not set
# CONFIG_OVERLAY_FS_METACOPY is not set

#
# Caches
#
CONFIG_FSCACHE=m
CONFIG_FSCACHE_STATS=y
# CONFIG_FSCACHE_HISTOGRAM is not set
# CONFIG_FSCACHE_DEBUG is not set
# CONFIG_FSCACHE_OBJECT_LIST is not set
CONFIG_CACHEFILES=m
# CONFIG_CACHEFILES_DEBUG is not set
# CONFIG_CACHEFILES_HISTOGRAM is not set
# end of Caches

#
# CD-ROM/DVD Filesystems
#
CONFIG_ISO9660_FS=m
CONFIG_JOLIET=y
CONFIG_ZISOFS=y
CONFIG_UDF_FS=m
# end of CD-ROM/DVD Filesystems

#
# DOS/FAT/EXFAT/NT Filesystems
#
CONFIG_FAT_FS=m
CONFIG_MSDOS_FS=m
CONFIG_VFAT_FS=m
CONFIG_FAT_DEFAULT_CODEPAGE=437
CONFIG_FAT_DEFAULT_IOCHARSET="ascii"
# CONFIG_FAT_DEFAULT_UTF8 is not set
# CONFIG_EXFAT_FS is not set
# CONFIG_NTFS_FS is not set
# end of DOS/FAT/EXFAT/NT Filesystems

#
# Pseudo filesystems
#
CONFIG_PROC_FS=y
CONFIG_PROC_KCORE=y
CONFIG_PROC_VMCORE=y
CONFIG_PROC_VMCORE_DEVICE_DUMP=y
CONFIG_PROC_SYSCTL=y
CONFIG_PROC_PAGE_MONITOR=y
CONFIG_PROC_CHILDREN=y
CONFIG_PROC_PID_ARCH_STATUS=y
CONFIG_PROC_CPU_RESCTRL=y
CONFIG_KERNFS=y
CONFIG_SYSFS=y
CONFIG_TMPFS=y
CONFIG_TMPFS_POSIX_ACL=y
CONFIG_TMPFS_XATTR=y
# CONFIG_TMPFS_INODE64 is not set
CONFIG_HUGETLBFS=y
CONFIG_HUGETLB_PAGE=y
CONFIG_MEMFD_CREATE=y
CONFIG_ARCH_HAS_GIGANTIC_PAGE=y
CONFIG_CONFIGFS_FS=y
CONFIG_EFIVAR_FS=y
# end of Pseudo filesystems

CONFIG_MISC_FILESYSTEMS=y
# CONFIG_ORANGEFS_FS is not set
# CONFIG_ADFS_FS is not set
# CONFIG_AFFS_FS is not set
# CONFIG_ECRYPT_FS is not set
# CONFIG_HFS_FS is not set
# CONFIG_HFSPLUS_FS is not set
# CONFIG_BEFS_FS is not set
# CONFIG_BFS_FS is not set
# CONFIG_EFS_FS is not set
CONFIG_CRAMFS=m
CONFIG_CRAMFS_BLOCKDEV=y
CONFIG_SQUASHFS=m
# CONFIG_SQUASHFS_FILE_CACHE is not set
CONFIG_SQUASHFS_FILE_DIRECT=y
# CONFIG_SQUASHFS_DECOMP_SINGLE is not set
# CONFIG_SQUASHFS_DECOMP_MULTI is not set
CONFIG_SQUASHFS_DECOMP_MULTI_PERCPU=y
CONFIG_SQUASHFS_XATTR=y
CONFIG_SQUASHFS_ZLIB=y
# CONFIG_SQUASHFS_LZ4 is not set
CONFIG_SQUASHFS_LZO=y
CONFIG_SQUASHFS_XZ=y
# CONFIG_SQUASHFS_ZSTD is not set
# CONFIG_SQUASHFS_4K_DEVBLK_SIZE is not set
# CONFIG_SQUASHFS_EMBEDDED is not set
CONFIG_SQUASHFS_FRAGMENT_CACHE_SIZE=3
# CONFIG_VXFS_FS is not set
CONFIG_MINIX_FS=m
# CONFIG_OMFS_FS is not set
# CONFIG_HPFS_FS is not set
# CONFIG_QNX4FS_FS is not set
# CONFIG_QNX6FS_FS is not set
# CONFIG_ROMFS_FS is not set
CONFIG_PSTORE=y
CONFIG_PSTORE_DEFAULT_KMSG_BYTES=10240
CONFIG_PSTORE_DEFLATE_COMPRESS=y
# CONFIG_PSTORE_LZO_COMPRESS is not set
# CONFIG_PSTORE_LZ4_COMPRESS is not set
# CONFIG_PSTORE_LZ4HC_COMPRESS is not set
# CONFIG_PSTORE_842_COMPRESS is not set
# CONFIG_PSTORE_ZSTD_COMPRESS is not set
CONFIG_PSTORE_COMPRESS=y
CONFIG_PSTORE_DEFLATE_COMPRESS_DEFAULT=y
CONFIG_PSTORE_COMPRESS_DEFAULT="deflate"
# CONFIG_PSTORE_CONSOLE is not set
# CONFIG_PSTORE_PMSG is not set
# CONFIG_PSTORE_FTRACE is not set
CONFIG_PSTORE_RAM=m
# CONFIG_PSTORE_BLK is not set
# CONFIG_SYSV_FS is not set
# CONFIG_UFS_FS is not set
# CONFIG_EROFS_FS is not set
CONFIG_NETWORK_FILESYSTEMS=y
CONFIG_NFS_FS=y
# CONFIG_NFS_V2 is not set
CONFIG_NFS_V3=y
CONFIG_NFS_V3_ACL=y
CONFIG_NFS_V4=m
# CONFIG_NFS_SWAP is not set
CONFIG_NFS_V4_1=y
CONFIG_NFS_V4_2=y
CONFIG_PNFS_FILE_LAYOUT=m
CONFIG_PNFS_BLOCK=m
CONFIG_PNFS_FLEXFILE_LAYOUT=m
CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN="kernel.org"
# CONFIG_NFS_V4_1_MIGRATION is not set
CONFIG_NFS_V4_SECURITY_LABEL=y
CONFIG_ROOT_NFS=y
# CONFIG_NFS_USE_LEGACY_DNS is not set
CONFIG_NFS_USE_KERNEL_DNS=y
CONFIG_NFS_DEBUG=y
CONFIG_NFS_DISABLE_UDP_SUPPORT=y
# CONFIG_NFS_V4_2_READ_PLUS is not set
CONFIG_NFSD=m
CONFIG_NFSD_V2_ACL=y
CONFIG_NFSD_V3=y
CONFIG_NFSD_V3_ACL=y
CONFIG_NFSD_V4=y
CONFIG_NFSD_PNFS=y
# CONFIG_NFSD_BLOCKLAYOUT is not set
CONFIG_NFSD_SCSILAYOUT=y
# CONFIG_NFSD_FLEXFILELAYOUT is not set
# CONFIG_NFSD_V4_2_INTER_SSC is not set
CONFIG_NFSD_V4_SECURITY_LABEL=y
CONFIG_GRACE_PERIOD=y
CONFIG_LOCKD=y
CONFIG_LOCKD_V4=y
CONFIG_NFS_ACL_SUPPORT=y
CONFIG_NFS_COMMON=y
CONFIG_NFS_V4_2_SSC_HELPER=y
CONFIG_SUNRPC=y
CONFIG_SUNRPC_GSS=m
CONFIG_SUNRPC_BACKCHANNEL=y
CONFIG_RPCSEC_GSS_KRB5=m
# CONFIG_SUNRPC_DISABLE_INSECURE_ENCTYPES is not set
CONFIG_SUNRPC_DEBUG=y
CONFIG_SUNRPC_XPRT_RDMA=m
CONFIG_CEPH_FS=m
# CONFIG_CEPH_FSCACHE is not set
CONFIG_CEPH_FS_POSIX_ACL=y
# CONFIG_CEPH_FS_SECURITY_LABEL is not set
CONFIG_CIFS=m
# CONFIG_CIFS_STATS2 is not set
CONFIG_CIFS_ALLOW_INSECURE_LEGACY=y
CONFIG_CIFS_WEAK_PW_HASH=y
CONFIG_CIFS_UPCALL=y
CONFIG_CIFS_XATTR=y
CONFIG_CIFS_POSIX=y
CONFIG_CIFS_DEBUG=y
# CONFIG_CIFS_DEBUG2 is not set
# CONFIG_CIFS_DEBUG_DUMP_KEYS is not set
CONFIG_CIFS_DFS_UPCALL=y
# CONFIG_CIFS_SWN_UPCALL is not set
# CONFIG_CIFS_SMB_DIRECT is not set
# CONFIG_CIFS_FSCACHE is not set
# CONFIG_CODA_FS is not set
# CONFIG_AFS_FS is not set
# CONFIG_9P_FS is not set
CONFIG_NLS=y
CONFIG_NLS_DEFAULT="utf8"
CONFIG_NLS_CODEPAGE_437=y
CONFIG_NLS_CODEPAGE_737=m
CONFIG_NLS_CODEPAGE_775=m
CONFIG_NLS_CODEPAGE_850=m
CONFIG_NLS_CODEPAGE_852=m
CONFIG_NLS_CODEPAGE_855=m
CONFIG_NLS_CODEPAGE_857=m
CONFIG_NLS_CODEPAGE_860=m
CONFIG_NLS_CODEPAGE_861=m
CONFIG_NLS_CODEPAGE_862=m
CONFIG_NLS_CODEPAGE_863=m
CONFIG_NLS_CODEPAGE_864=m
CONFIG_NLS_CODEPAGE_865=m
CONFIG_NLS_CODEPAGE_866=m
CONFIG_NLS_CODEPAGE_869=m
CONFIG_NLS_CODEPAGE_936=m
CONFIG_NLS_CODEPAGE_950=m
CONFIG_NLS_CODEPAGE_932=m
CONFIG_NLS_CODEPAGE_949=m
CONFIG_NLS_CODEPAGE_874=m
CONFIG_NLS_ISO8859_8=m
CONFIG_NLS_CODEPAGE_1250=m
CONFIG_NLS_CODEPAGE_1251=m
CONFIG_NLS_ASCII=y
CONFIG_NLS_ISO8859_1=m
CONFIG_NLS_ISO8859_2=m
CONFIG_NLS_ISO8859_3=m
CONFIG_NLS_ISO8859_4=m
CONFIG_NLS_ISO8859_5=m
CONFIG_NLS_ISO8859_6=m
CONFIG_NLS_ISO8859_7=m
CONFIG_NLS_ISO8859_9=m
CONFIG_NLS_ISO8859_13=m
CONFIG_NLS_ISO8859_14=m
CONFIG_NLS_ISO8859_15=m
CONFIG_NLS_KOI8_R=m
CONFIG_NLS_KOI8_U=m
CONFIG_NLS_MAC_ROMAN=m
CONFIG_NLS_MAC_CELTIC=m
CONFIG_NLS_MAC_CENTEURO=m
CONFIG_NLS_MAC_CROATIAN=m
CONFIG_NLS_MAC_CYRILLIC=m
CONFIG_NLS_MAC_GAELIC=m
CONFIG_NLS_MAC_GREEK=m
CONFIG_NLS_MAC_ICELAND=m
CONFIG_NLS_MAC_INUIT=m
CONFIG_NLS_MAC_ROMANIAN=m
CONFIG_NLS_MAC_TURKISH=m
CONFIG_NLS_UTF8=m
CONFIG_DLM=m
CONFIG_DLM_DEBUG=y
# CONFIG_UNICODE is not set
CONFIG_IO_WQ=y
# end of File systems

#
# Security options
#
CONFIG_KEYS=y
# CONFIG_KEYS_REQUEST_CACHE is not set
CONFIG_PERSISTENT_KEYRINGS=y
CONFIG_TRUSTED_KEYS=y
CONFIG_ENCRYPTED_KEYS=y
# CONFIG_KEY_DH_OPERATIONS is not set
# CONFIG_SECURITY_DMESG_RESTRICT is not set
CONFIG_SECURITY=y
CONFIG_SECURITY_WRITABLE_HOOKS=y
CONFIG_SECURITYFS=y
CONFIG_SECURITY_NETWORK=y
CONFIG_PAGE_TABLE_ISOLATION=y
# CONFIG_SECURITY_INFINIBAND is not set
CONFIG_SECURITY_NETWORK_XFRM=y
CONFIG_SECURITY_PATH=y
CONFIG_INTEL_TXT=y
CONFIG_LSM_MMAP_MIN_ADDR=65535
CONFIG_HAVE_HARDENED_USERCOPY_ALLOCATOR=y
CONFIG_HARDENED_USERCOPY=y
CONFIG_HARDENED_USERCOPY_FALLBACK=y
CONFIG_FORTIFY_SOURCE=y
# CONFIG_STATIC_USERMODEHELPER is not set
CONFIG_SECURITY_SELINUX=y
CONFIG_SECURITY_SELINUX_BOOTPARAM=y
CONFIG_SECURITY_SELINUX_DISABLE=y
CONFIG_SECURITY_SELINUX_DEVELOP=y
CONFIG_SECURITY_SELINUX_AVC_STATS=y
CONFIG_SECURITY_SELINUX_CHECKREQPROT_VALUE=1
CONFIG_SECURITY_SELINUX_SIDTAB_HASH_BITS=9
CONFIG_SECURITY_SELINUX_SID2STR_CACHE_SIZE=256
# CONFIG_SECURITY_SMACK is not set
# CONFIG_SECURITY_TOMOYO is not set
CONFIG_SECURITY_APPARMOR=y
CONFIG_SECURITY_APPARMOR_HASH=y
CONFIG_SECURITY_APPARMOR_HASH_DEFAULT=y
# CONFIG_SECURITY_APPARMOR_DEBUG is not set
# CONFIG_SECURITY_APPARMOR_KUNIT_TEST is not set
# CONFIG_SECURITY_LOADPIN is not set
CONFIG_SECURITY_YAMA=y
# CONFIG_SECURITY_SAFESETID is not set
# CONFIG_SECURITY_LOCKDOWN_LSM is not set
CONFIG_INTEGRITY=y
CONFIG_INTEGRITY_SIGNATURE=y
CONFIG_INTEGRITY_ASYMMETRIC_KEYS=y
CONFIG_INTEGRITY_TRUSTED_KEYRING=y
# CONFIG_INTEGRITY_PLATFORM_KEYRING is not set
CONFIG_INTEGRITY_AUDIT=y
CONFIG_IMA=y
CONFIG_IMA_MEASURE_PCR_IDX=10
CONFIG_IMA_LSM_RULES=y
# CONFIG_IMA_TEMPLATE is not set
CONFIG_IMA_NG_TEMPLATE=y
# CONFIG_IMA_SIG_TEMPLATE is not set
CONFIG_IMA_DEFAULT_TEMPLATE="ima-ng"
CONFIG_IMA_DEFAULT_HASH_SHA1=y
# CONFIG_IMA_DEFAULT_HASH_SHA256 is not set
# CONFIG_IMA_DEFAULT_HASH_SHA512 is not set
CONFIG_IMA_DEFAULT_HASH="sha1"
# CONFIG_IMA_WRITE_POLICY is not set
# CONFIG_IMA_READ_POLICY is not set
CONFIG_IMA_APPRAISE=y
# CONFIG_IMA_ARCH_POLICY is not set
# CONFIG_IMA_APPRAISE_BUILD_POLICY is not set
CONFIG_IMA_APPRAISE_BOOTPARAM=y
# CONFIG_IMA_APPRAISE_MODSIG is not set
CONFIG_IMA_TRUSTED_KEYRING=y
# CONFIG_IMA_BLACKLIST_KEYRING is not set
# CONFIG_IMA_LOAD_X509 is not set
CONFIG_IMA_MEASURE_ASYMMETRIC_KEYS=y
CONFIG_IMA_QUEUE_EARLY_BOOT_KEYS=y
# CONFIG_IMA_SECURE_AND_OR_TRUSTED_BOOT is not set
CONFIG_EVM=y
CONFIG_EVM_ATTR_FSUUID=y
# CONFIG_EVM_ADD_XATTRS is not set
# CONFIG_EVM_LOAD_X509 is not set
CONFIG_DEFAULT_SECURITY_SELINUX=y
# CONFIG_DEFAULT_SECURITY_APPARMOR is not set
# CONFIG_DEFAULT_SECURITY_DAC is not set
CONFIG_LSM="lockdown,yama,loadpin,safesetid,integrity,selinux,smack,tomoyo,apparmor,bpf"

#
# Kernel hardening options
#

#
# Memory initialization
#
CONFIG_INIT_STACK_NONE=y
# CONFIG_INIT_ON_ALLOC_DEFAULT_ON is not set
# CONFIG_INIT_ON_FREE_DEFAULT_ON is not set
# end of Memory initialization
# end of Kernel hardening options
# end of Security options

CONFIG_XOR_BLOCKS=m
CONFIG_ASYNC_CORE=m
CONFIG_ASYNC_MEMCPY=m
CONFIG_ASYNC_XOR=m
CONFIG_ASYNC_PQ=m
CONFIG_ASYNC_RAID6_RECOV=m
CONFIG_CRYPTO=y

#
# Crypto core or helper
#
CONFIG_CRYPTO_ALGAPI=y
CONFIG_CRYPTO_ALGAPI2=y
CONFIG_CRYPTO_AEAD=y
CONFIG_CRYPTO_AEAD2=y
CONFIG_CRYPTO_SKCIPHER=y
CONFIG_CRYPTO_SKCIPHER2=y
CONFIG_CRYPTO_HASH=y
CONFIG_CRYPTO_HASH2=y
CONFIG_CRYPTO_RNG=y
CONFIG_CRYPTO_RNG2=y
CONFIG_CRYPTO_RNG_DEFAULT=y
CONFIG_CRYPTO_AKCIPHER2=y
CONFIG_CRYPTO_AKCIPHER=y
CONFIG_CRYPTO_KPP2=y
CONFIG_CRYPTO_KPP=m
CONFIG_CRYPTO_ACOMP2=y
CONFIG_CRYPTO_MANAGER=y
CONFIG_CRYPTO_MANAGER2=y
CONFIG_CRYPTO_USER=m
CONFIG_CRYPTO_MANAGER_DISABLE_TESTS=y
CONFIG_CRYPTO_GF128MUL=y
CONFIG_CRYPTO_NULL=y
CONFIG_CRYPTO_NULL2=y
CONFIG_CRYPTO_PCRYPT=m
CONFIG_CRYPTO_CRYPTD=y
CONFIG_CRYPTO_AUTHENC=m
CONFIG_CRYPTO_TEST=m
CONFIG_CRYPTO_SIMD=y

#
# Public-key cryptography
#
CONFIG_CRYPTO_RSA=y
CONFIG_CRYPTO_DH=m
CONFIG_CRYPTO_ECC=m
CONFIG_CRYPTO_ECDH=m
# CONFIG_CRYPTO_ECRDSA is not set
# CONFIG_CRYPTO_SM2 is not set
# CONFIG_CRYPTO_CURVE25519 is not set
# CONFIG_CRYPTO_CURVE25519_X86 is not set

#
# Authenticated Encryption with Associated Data
#
CONFIG_CRYPTO_CCM=m
CONFIG_CRYPTO_GCM=y
CONFIG_CRYPTO_CHACHA20POLY1305=m
# CONFIG_CRYPTO_AEGIS128 is not set
# CONFIG_CRYPTO_AEGIS128_AESNI_SSE2 is not set
CONFIG_CRYPTO_SEQIV=y
CONFIG_CRYPTO_ECHAINIV=m

#
# Block modes
#
CONFIG_CRYPTO_CBC=y
CONFIG_CRYPTO_CFB=y
CONFIG_CRYPTO_CTR=y
CONFIG_CRYPTO_CTS=y
CONFIG_CRYPTO_ECB=y
CONFIG_CRYPTO_LRW=m
# CONFIG_CRYPTO_OFB is not set
CONFIG_CRYPTO_PCBC=m
CONFIG_CRYPTO_XTS=y
# CONFIG_CRYPTO_KEYWRAP is not set
# CONFIG_CRYPTO_NHPOLY1305_SSE2 is not set
# CONFIG_CRYPTO_NHPOLY1305_AVX2 is not set
# CONFIG_CRYPTO_ADIANTUM is not set
CONFIG_CRYPTO_ESSIV=m

#
# Hash modes
#
CONFIG_CRYPTO_CMAC=m
CONFIG_CRYPTO_HMAC=y
CONFIG_CRYPTO_XCBC=m
CONFIG_CRYPTO_VMAC=m

#
# Digest
#
CONFIG_CRYPTO_CRC32C=y
CONFIG_CRYPTO_CRC32C_INTEL=m
CONFIG_CRYPTO_CRC32=m
CONFIG_CRYPTO_CRC32_PCLMUL=m
CONFIG_CRYPTO_XXHASH=m
CONFIG_CRYPTO_BLAKE2B=m
# CONFIG_CRYPTO_BLAKE2S is not set
# CONFIG_CRYPTO_BLAKE2S_X86 is not set
CONFIG_CRYPTO_CRCT10DIF=y
CONFIG_CRYPTO_CRCT10DIF_PCLMUL=m
CONFIG_CRYPTO_GHASH=y
CONFIG_CRYPTO_POLY1305=m
CONFIG_CRYPTO_POLY1305_X86_64=m
CONFIG_CRYPTO_MD4=m
CONFIG_CRYPTO_MD5=y
CONFIG_CRYPTO_MICHAEL_MIC=m
CONFIG_CRYPTO_RMD160=m
CONFIG_CRYPTO_SHA1=y
CONFIG_CRYPTO_SHA1_SSSE3=y
CONFIG_CRYPTO_SHA256_SSSE3=y
CONFIG_CRYPTO_SHA512_SSSE3=m
CONFIG_CRYPTO_SHA256=y
CONFIG_CRYPTO_SHA512=y
CONFIG_CRYPTO_SHA3=m
# CONFIG_CRYPTO_SM3 is not set
# CONFIG_CRYPTO_STREEBOG is not set
CONFIG_CRYPTO_WP512=m
CONFIG_CRYPTO_GHASH_CLMUL_NI_INTEL=m

#
# Ciphers
#
CONFIG_CRYPTO_AES=y
# CONFIG_CRYPTO_AES_TI is not set
CONFIG_CRYPTO_AES_NI_INTEL=y
CONFIG_CRYPTO_ANUBIS=m
CONFIG_CRYPTO_ARC4=m
CONFIG_CRYPTO_BLOWFISH=m
CONFIG_CRYPTO_BLOWFISH_COMMON=m
CONFIG_CRYPTO_BLOWFISH_X86_64=m
CONFIG_CRYPTO_CAMELLIA=m
CONFIG_CRYPTO_CAMELLIA_X86_64=m
CONFIG_CRYPTO_CAMELLIA_AESNI_AVX_X86_64=m
CONFIG_CRYPTO_CAMELLIA_AESNI_AVX2_X86_64=m
CONFIG_CRYPTO_CAST_COMMON=m
CONFIG_CRYPTO_CAST5=m
CONFIG_CRYPTO_CAST5_AVX_X86_64=m
CONFIG_CRYPTO_CAST6=m
CONFIG_CRYPTO_CAST6_AVX_X86_64=m
CONFIG_CRYPTO_DES=m
CONFIG_CRYPTO_DES3_EDE_X86_64=m
CONFIG_CRYPTO_FCRYPT=m
CONFIG_CRYPTO_KHAZAD=m
CONFIG_CRYPTO_CHACHA20=m
CONFIG_CRYPTO_CHACHA20_X86_64=m
CONFIG_CRYPTO_SEED=m
CONFIG_CRYPTO_SERPENT=m
CONFIG_CRYPTO_SERPENT_SSE2_X86_64=m
CONFIG_CRYPTO_SERPENT_AVX_X86_64=m
CONFIG_CRYPTO_SERPENT_AVX2_X86_64=m
# CONFIG_CRYPTO_SM4 is not set
CONFIG_CRYPTO_TEA=m
CONFIG_CRYPTO_TWOFISH=m
CONFIG_CRYPTO_TWOFISH_COMMON=m
CONFIG_CRYPTO_TWOFISH_X86_64=m
CONFIG_CRYPTO_TWOFISH_X86_64_3WAY=m
CONFIG_CRYPTO_TWOFISH_AVX_X86_64=m

#
# Compression
#
CONFIG_CRYPTO_DEFLATE=y
CONFIG_CRYPTO_LZO=y
# CONFIG_CRYPTO_842 is not set
# CONFIG_CRYPTO_LZ4 is not set
# CONFIG_CRYPTO_LZ4HC is not set
# CONFIG_CRYPTO_ZSTD is not set

#
# Random Number Generation
#
CONFIG_CRYPTO_ANSI_CPRNG=m
CONFIG_CRYPTO_DRBG_MENU=y
CONFIG_CRYPTO_DRBG_HMAC=y
CONFIG_CRYPTO_DRBG_HASH=y
CONFIG_CRYPTO_DRBG_CTR=y
CONFIG_CRYPTO_DRBG=y
CONFIG_CRYPTO_JITTERENTROPY=y
CONFIG_CRYPTO_USER_API=y
CONFIG_CRYPTO_USER_API_HASH=y
CONFIG_CRYPTO_USER_API_SKCIPHER=y
CONFIG_CRYPTO_USER_API_RNG=y
# CONFIG_CRYPTO_USER_API_RNG_CAVP is not set
CONFIG_CRYPTO_USER_API_AEAD=y
CONFIG_CRYPTO_USER_API_ENABLE_OBSOLETE=y
# CONFIG_CRYPTO_STATS is not set
CONFIG_CRYPTO_HASH_INFO=y

#
# Crypto library routines
#
CONFIG_CRYPTO_LIB_AES=y
CONFIG_CRYPTO_LIB_ARC4=m
# CONFIG_CRYPTO_LIB_BLAKE2S is not set
CONFIG_CRYPTO_ARCH_HAVE_LIB_CHACHA=m
CONFIG_CRYPTO_LIB_CHACHA_GENERIC=m
# CONFIG_CRYPTO_LIB_CHACHA is not set
# CONFIG_CRYPTO_LIB_CURVE25519 is not set
CONFIG_CRYPTO_LIB_DES=m
CONFIG_CRYPTO_LIB_POLY1305_RSIZE=11
CONFIG_CRYPTO_ARCH_HAVE_LIB_POLY1305=m
CONFIG_CRYPTO_LIB_POLY1305_GENERIC=m
# CONFIG_CRYPTO_LIB_POLY1305 is not set
# CONFIG_CRYPTO_LIB_CHACHA20POLY1305 is not set
CONFIG_CRYPTO_LIB_SHA256=y
CONFIG_CRYPTO_HW=y
CONFIG_CRYPTO_DEV_PADLOCK=m
CONFIG_CRYPTO_DEV_PADLOCK_AES=m
CONFIG_CRYPTO_DEV_PADLOCK_SHA=m
# CONFIG_CRYPTO_DEV_ATMEL_ECC is not set
# CONFIG_CRYPTO_DEV_ATMEL_SHA204A is not set
CONFIG_CRYPTO_DEV_CCP=y
CONFIG_CRYPTO_DEV_CCP_DD=m
CONFIG_CRYPTO_DEV_SP_CCP=y
CONFIG_CRYPTO_DEV_CCP_CRYPTO=m
CONFIG_CRYPTO_DEV_SP_PSP=y
# CONFIG_CRYPTO_DEV_CCP_DEBUGFS is not set
CONFIG_CRYPTO_DEV_QAT=m
CONFIG_CRYPTO_DEV_QAT_DH895xCC=m
CONFIG_CRYPTO_DEV_QAT_C3XXX=m
CONFIG_CRYPTO_DEV_QAT_C62X=m
# CONFIG_CRYPTO_DEV_QAT_4XXX is not set
CONFIG_CRYPTO_DEV_QAT_DH895xCCVF=m
CONFIG_CRYPTO_DEV_QAT_C3XXXVF=m
CONFIG_CRYPTO_DEV_QAT_C62XVF=m
CONFIG_CRYPTO_DEV_NITROX=m
CONFIG_CRYPTO_DEV_NITROX_CNN55XX=m
# CONFIG_CRYPTO_DEV_VIRTIO is not set
# CONFIG_CRYPTO_DEV_SAFEXCEL is not set
# CONFIG_CRYPTO_DEV_AMLOGIC_GXL is not set
CONFIG_ASYMMETRIC_KEY_TYPE=y
CONFIG_ASYMMETRIC_PUBLIC_KEY_SUBTYPE=y
# CONFIG_ASYMMETRIC_TPM_KEY_SUBTYPE is not set
CONFIG_X509_CERTIFICATE_PARSER=y
# CONFIG_PKCS8_PRIVATE_KEY_PARSER is not set
CONFIG_PKCS7_MESSAGE_PARSER=y
# CONFIG_PKCS7_TEST_KEY is not set
CONFIG_SIGNED_PE_FILE_VERIFICATION=y

#
# Certificates for signature checking
#
CONFIG_MODULE_SIG_KEY="certs/signing_key.pem"
CONFIG_SYSTEM_TRUSTED_KEYRING=y
CONFIG_SYSTEM_TRUSTED_KEYS=""
# CONFIG_SYSTEM_EXTRA_CERTIFICATE is not set
# CONFIG_SECONDARY_TRUSTED_KEYRING is not set
CONFIG_SYSTEM_BLACKLIST_KEYRING=y
CONFIG_SYSTEM_BLACKLIST_HASH_LIST=""
# end of Certificates for signature checking

CONFIG_BINARY_PRINTF=y

#
# Library routines
#
CONFIG_RAID6_PQ=m
CONFIG_RAID6_PQ_BENCHMARK=y
# CONFIG_PACKING is not set
CONFIG_BITREVERSE=y
CONFIG_GENERIC_STRNCPY_FROM_USER=y
CONFIG_GENERIC_STRNLEN_USER=y
CONFIG_GENERIC_NET_UTILS=y
CONFIG_GENERIC_FIND_FIRST_BIT=y
CONFIG_CORDIC=m
# CONFIG_PRIME_NUMBERS is not set
CONFIG_RATIONAL=y
CONFIG_GENERIC_PCI_IOMAP=y
CONFIG_GENERIC_IOMAP=y
CONFIG_ARCH_USE_CMPXCHG_LOCKREF=y
CONFIG_ARCH_HAS_FAST_MULTIPLIER=y
CONFIG_ARCH_USE_SYM_ANNOTATIONS=y
CONFIG_CRC_CCITT=y
CONFIG_CRC16=y
CONFIG_CRC_T10DIF=y
CONFIG_CRC_ITU_T=m
CONFIG_CRC32=y
# CONFIG_CRC32_SELFTEST is not set
CONFIG_CRC32_SLICEBY8=y
# CONFIG_CRC32_SLICEBY4 is not set
# CONFIG_CRC32_SARWATE is not set
# CONFIG_CRC32_BIT is not set
# CONFIG_CRC64 is not set
# CONFIG_CRC4 is not set
CONFIG_CRC7=m
CONFIG_LIBCRC32C=m
CONFIG_CRC8=m
CONFIG_XXHASH=y
# CONFIG_RANDOM32_SELFTEST is not set
CONFIG_ZLIB_INFLATE=y
CONFIG_ZLIB_DEFLATE=y
CONFIG_LZO_COMPRESS=y
CONFIG_LZO_DECOMPRESS=y
CONFIG_LZ4_DECOMPRESS=y
CONFIG_ZSTD_COMPRESS=m
CONFIG_ZSTD_DECOMPRESS=y
CONFIG_XZ_DEC=y
CONFIG_XZ_DEC_X86=y
CONFIG_XZ_DEC_POWERPC=y
CONFIG_XZ_DEC_IA64=y
CONFIG_XZ_DEC_ARM=y
CONFIG_XZ_DEC_ARMTHUMB=y
CONFIG_XZ_DEC_SPARC=y
CONFIG_XZ_DEC_BCJ=y
# CONFIG_XZ_DEC_TEST is not set
CONFIG_DECOMPRESS_GZIP=y
CONFIG_DECOMPRESS_BZIP2=y
CONFIG_DECOMPRESS_LZMA=y
CONFIG_DECOMPRESS_XZ=y
CONFIG_DECOMPRESS_LZO=y
CONFIG_DECOMPRESS_LZ4=y
CONFIG_DECOMPRESS_ZSTD=y
CONFIG_GENERIC_ALLOCATOR=y
CONFIG_REED_SOLOMON=m
CONFIG_REED_SOLOMON_ENC8=y
CONFIG_REED_SOLOMON_DEC8=y
CONFIG_TEXTSEARCH=y
CONFIG_TEXTSEARCH_KMP=m
CONFIG_TEXTSEARCH_BM=m
CONFIG_TEXTSEARCH_FSM=m
CONFIG_INTERVAL_TREE=y
CONFIG_XARRAY_MULTI=y
CONFIG_ASSOCIATIVE_ARRAY=y
CONFIG_HAS_IOMEM=y
CONFIG_HAS_IOPORT_MAP=y
CONFIG_HAS_DMA=y
CONFIG_DMA_OPS=y
CONFIG_NEED_SG_DMA_LENGTH=y
CONFIG_NEED_DMA_MAP_STATE=y
CONFIG_ARCH_DMA_ADDR_T_64BIT=y
CONFIG_ARCH_HAS_FORCE_DMA_UNENCRYPTED=y
CONFIG_SWIOTLB=y
CONFIG_DMA_COHERENT_POOL=y
CONFIG_DMA_CMA=y
# CONFIG_DMA_PERNUMA_CMA is not set

#
# Default contiguous memory area size:
#
CONFIG_CMA_SIZE_MBYTES=200
CONFIG_CMA_SIZE_SEL_MBYTES=y
# CONFIG_CMA_SIZE_SEL_PERCENTAGE is not set
# CONFIG_CMA_SIZE_SEL_MIN is not set
# CONFIG_CMA_SIZE_SEL_MAX is not set
CONFIG_CMA_ALIGNMENT=8
# CONFIG_DMA_API_DEBUG is not set
# CONFIG_DMA_MAP_BENCHMARK is not set
CONFIG_SGL_ALLOC=y
CONFIG_CHECK_SIGNATURE=y
CONFIG_CPUMASK_OFFSTACK=y
CONFIG_CPU_RMAP=y
CONFIG_DQL=y
CONFIG_GLOB=y
# CONFIG_GLOB_SELFTEST is not set
CONFIG_NLATTR=y
CONFIG_CLZ_TAB=y
CONFIG_IRQ_POLL=y
CONFIG_MPILIB=y
CONFIG_SIGNATURE=y
CONFIG_DIMLIB=y
CONFIG_OID_REGISTRY=y
CONFIG_UCS2_STRING=y
CONFIG_HAVE_GENERIC_VDSO=y
CONFIG_GENERIC_GETTIMEOFDAY=y
CONFIG_GENERIC_VDSO_TIME_NS=y
CONFIG_FONT_SUPPORT=y
# CONFIG_FONTS is not set
CONFIG_FONT_8x8=y
CONFIG_FONT_8x16=y
CONFIG_SG_POOL=y
CONFIG_ARCH_HAS_PMEM_API=y
CONFIG_MEMREGION=y
CONFIG_ARCH_HAS_UACCESS_FLUSHCACHE=y
CONFIG_ARCH_HAS_COPY_MC=y
CONFIG_ARCH_STACKWALK=y
CONFIG_SBITMAP=y
# CONFIG_STRING_SELFTEST is not set
# end of Library routines

#
# Kernel hacking
#

#
# printk and dmesg options
#
CONFIG_PRINTK_TIME=y
# CONFIG_PRINTK_CALLER is not set
CONFIG_CONSOLE_LOGLEVEL_DEFAULT=7
CONFIG_CONSOLE_LOGLEVEL_QUIET=4
CONFIG_MESSAGE_LOGLEVEL_DEFAULT=4
CONFIG_BOOT_PRINTK_DELAY=y
CONFIG_DYNAMIC_DEBUG=y
CONFIG_DYNAMIC_DEBUG_CORE=y
CONFIG_SYMBOLIC_ERRNAME=y
CONFIG_DEBUG_BUGVERBOSE=y
# end of printk and dmesg options

#
# Compile-time checks and compiler options
#
CONFIG_DEBUG_INFO=y
CONFIG_DEBUG_INFO_REDUCED=y
# CONFIG_DEBUG_INFO_COMPRESSED is not set
# CONFIG_DEBUG_INFO_SPLIT is not set
# CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT is not set
CONFIG_DEBUG_INFO_DWARF4=y
# CONFIG_DEBUG_INFO_DWARF5 is not set
# CONFIG_GDB_SCRIPTS is not set
CONFIG_FRAME_WARN=2048
CONFIG_STRIP_ASM_SYMS=y
# CONFIG_READABLE_ASM is not set
# CONFIG_HEADERS_INSTALL is not set
CONFIG_DEBUG_SECTION_MISMATCH=y
CONFIG_SECTION_MISMATCH_WARN_ONLY=y
CONFIG_STACK_VALIDATION=y
# CONFIG_DEBUG_FORCE_WEAK_PER_CPU is not set
# end of Compile-time checks and compiler options

#
# Generic Kernel Debugging Instruments
#
CONFIG_MAGIC_SYSRQ=y
CONFIG_MAGIC_SYSRQ_DEFAULT_ENABLE=0x1
CONFIG_MAGIC_SYSRQ_SERIAL=y
CONFIG_MAGIC_SYSRQ_SERIAL_SEQUENCE=""
CONFIG_DEBUG_FS=y
CONFIG_DEBUG_FS_ALLOW_ALL=y
# CONFIG_DEBUG_FS_DISALLOW_MOUNT is not set
# CONFIG_DEBUG_FS_ALLOW_NONE is not set
CONFIG_HAVE_ARCH_KGDB=y
# CONFIG_KGDB is not set
CONFIG_ARCH_HAS_UBSAN_SANITIZE_ALL=y
# CONFIG_UBSAN is not set
CONFIG_HAVE_ARCH_KCSAN=y
# end of Generic Kernel Debugging Instruments

CONFIG_DEBUG_KERNEL=y
CONFIG_DEBUG_MISC=y

#
# Memory Debugging
#
# CONFIG_PAGE_EXTENSION is not set
# CONFIG_DEBUG_PAGEALLOC is not set
# CONFIG_PAGE_OWNER is not set
# CONFIG_PAGE_POISONING is not set
# CONFIG_DEBUG_PAGE_REF is not set
# CONFIG_DEBUG_RODATA_TEST is not set
CONFIG_ARCH_HAS_DEBUG_WX=y
# CONFIG_DEBUG_WX is not set
CONFIG_GENERIC_PTDUMP=y
# CONFIG_PTDUMP_DEBUGFS is not set
# CONFIG_DEBUG_OBJECTS is not set
# CONFIG_SLUB_DEBUG_ON is not set
# CONFIG_SLUB_STATS is not set
CONFIG_HAVE_DEBUG_KMEMLEAK=y
# CONFIG_DEBUG_KMEMLEAK is not set
# CONFIG_DEBUG_STACK_USAGE is not set
# CONFIG_SCHED_STACK_END_CHECK is not set
CONFIG_ARCH_HAS_DEBUG_VM_PGTABLE=y
# CONFIG_DEBUG_VM is not set
# CONFIG_DEBUG_VM_PGTABLE is not set
CONFIG_ARCH_HAS_DEBUG_VIRTUAL=y
# CONFIG_DEBUG_VIRTUAL is not set
CONFIG_DEBUG_MEMORY_INIT=y
# CONFIG_DEBUG_PER_CPU_MAPS is not set
CONFIG_HAVE_ARCH_KASAN=y
CONFIG_HAVE_ARCH_KASAN_VMALLOC=y
CONFIG_CC_HAS_KASAN_GENERIC=y
CONFIG_CC_HAS_WORKING_NOSANITIZE_ADDRESS=y
# CONFIG_KASAN is not set
CONFIG_HAVE_ARCH_KFENCE=y
# CONFIG_KFENCE is not set
# end of Memory Debugging

CONFIG_DEBUG_SHIRQ=y

#
# Debug Oops, Lockups and Hangs
#
CONFIG_PANIC_ON_OOPS=y
CONFIG_PANIC_ON_OOPS_VALUE=1
CONFIG_PANIC_TIMEOUT=0
CONFIG_LOCKUP_DETECTOR=y
CONFIG_SOFTLOCKUP_DETECTOR=y
# CONFIG_BOOTPARAM_SOFTLOCKUP_PANIC is not set
CONFIG_BOOTPARAM_SOFTLOCKUP_PANIC_VALUE=0
CONFIG_HARDLOCKUP_DETECTOR_PERF=y
CONFIG_HARDLOCKUP_CHECK_TIMESTAMP=y
CONFIG_HARDLOCKUP_DETECTOR=y
CONFIG_BOOTPARAM_HARDLOCKUP_PANIC=y
CONFIG_BOOTPARAM_HARDLOCKUP_PANIC_VALUE=1
# CONFIG_DETECT_HUNG_TASK is not set
# CONFIG_WQ_WATCHDOG is not set
# CONFIG_TEST_LOCKUP is not set
# end of Debug Oops, Lockups and Hangs

#
# Scheduler Debugging
#
CONFIG_SCHED_DEBUG=y
CONFIG_SCHED_INFO=y
CONFIG_SCHEDSTATS=y
# end of Scheduler Debugging

# CONFIG_DEBUG_TIMEKEEPING is not set

#
# Lock Debugging (spinlocks, mutexes, etc...)
#
CONFIG_LOCK_DEBUGGING_SUPPORT=y
# CONFIG_PROVE_LOCKING is not set
# CONFIG_LOCK_STAT is not set
# CONFIG_DEBUG_RT_MUTEXES is not set
# CONFIG_DEBUG_SPINLOCK is not set
# CONFIG_DEBUG_MUTEXES is not set
# CONFIG_DEBUG_WW_MUTEX_SLOWPATH is not set
# CONFIG_DEBUG_RWSEMS is not set
# CONFIG_DEBUG_LOCK_ALLOC is not set
CONFIG_DEBUG_ATOMIC_SLEEP=y
# CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set
CONFIG_LOCK_TORTURE_TEST=m
# CONFIG_WW_MUTEX_SELFTEST is not set
# CONFIG_SCF_TORTURE_TEST is not set
# CONFIG_CSD_LOCK_WAIT_DEBUG is not set
# end of Lock Debugging (spinlocks, mutexes, etc...)

# CONFIG_DEBUG_IRQFLAGS is not set
CONFIG_STACKTRACE=y
# CONFIG_WARN_ALL_UNSEEDED_RANDOM is not set
# CONFIG_DEBUG_KOBJECT is not set

#
# Debug kernel data structures
#
CONFIG_DEBUG_LIST=y
# CONFIG_DEBUG_PLIST is not set
# CONFIG_DEBUG_SG is not set
# CONFIG_DEBUG_NOTIFIERS is not set
CONFIG_BUG_ON_DATA_CORRUPTION=y
# end of Debug kernel data structures

# CONFIG_DEBUG_CREDENTIALS is not set

#
# RCU Debugging
#
CONFIG_TORTURE_TEST=m
CONFIG_RCU_SCALE_TEST=m
CONFIG_RCU_TORTURE_TEST=m
# CONFIG_RCU_REF_SCALE_TEST is not set
CONFIG_RCU_CPU_STALL_TIMEOUT=60
# CONFIG_RCU_TRACE is not set
# CONFIG_RCU_EQS_DEBUG is not set
# end of RCU Debugging

# CONFIG_DEBUG_WQ_FORCE_RR_CPU is not set
# CONFIG_DEBUG_BLOCK_EXT_DEVT is not set
# CONFIG_CPU_HOTPLUG_STATE_CONTROL is not set
CONFIG_LATENCYTOP=y
CONFIG_USER_STACKTRACE_SUPPORT=y
CONFIG_NOP_TRACER=y
CONFIG_HAVE_FUNCTION_TRACER=y
CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y
CONFIG_HAVE_DYNAMIC_FTRACE=y
CONFIG_HAVE_DYNAMIC_FTRACE_WITH_REGS=y
CONFIG_HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS=y
CONFIG_HAVE_DYNAMIC_FTRACE_WITH_ARGS=y
CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y
CONFIG_HAVE_SYSCALL_TRACEPOINTS=y
CONFIG_HAVE_FENTRY=y
CONFIG_HAVE_OBJTOOL_MCOUNT=y
CONFIG_HAVE_C_RECORDMCOUNT=y
CONFIG_TRACER_MAX_TRACE=y
CONFIG_TRACE_CLOCK=y
CONFIG_RING_BUFFER=y
CONFIG_EVENT_TRACING=y
CONFIG_CONTEXT_SWITCH_TRACER=y
CONFIG_TRACING=y
CONFIG_GENERIC_TRACER=y
CONFIG_TRACING_SUPPORT=y
CONFIG_FTRACE=y
# CONFIG_BOOTTIME_TRACING is not set
CONFIG_FUNCTION_TRACER=y
CONFIG_FUNCTION_GRAPH_TRACER=y
CONFIG_DYNAMIC_FTRACE=y
CONFIG_DYNAMIC_FTRACE_WITH_REGS=y
CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS=y
CONFIG_FUNCTION_PROFILER=y
CONFIG_STACK_TRACER=y
# CONFIG_IRQSOFF_TRACER is not set
CONFIG_SCHED_TRACER=y
CONFIG_HWLAT_TRACER=y
# CONFIG_MMIOTRACE is not set
CONFIG_FTRACE_SYSCALLS=y
CONFIG_TRACER_SNAPSHOT=y
# CONFIG_TRACER_SNAPSHOT_PER_CPU_SWAP is not set
CONFIG_BRANCH_PROFILE_NONE=y
# CONFIG_PROFILE_ANNOTATED_BRANCHES is not set
CONFIG_BLK_DEV_IO_TRACE=y
CONFIG_KPROBE_EVENTS=y
# CONFIG_KPROBE_EVENTS_ON_NOTRACE is not set
CONFIG_UPROBE_EVENTS=y
CONFIG_BPF_EVENTS=y
CONFIG_DYNAMIC_EVENTS=y
CONFIG_PROBE_EVENTS=y
# CONFIG_BPF_KPROBE_OVERRIDE is not set
CONFIG_FTRACE_MCOUNT_RECORD=y
CONFIG_FTRACE_MCOUNT_USE_CC=y
CONFIG_TRACING_MAP=y
CONFIG_SYNTH_EVENTS=y
CONFIG_HIST_TRIGGERS=y
# CONFIG_TRACE_EVENT_INJECT is not set
# CONFIG_TRACEPOINT_BENCHMARK is not set
CONFIG_RING_BUFFER_BENCHMARK=m
# CONFIG_TRACE_EVAL_MAP_FILE is not set
# CONFIG_FTRACE_RECORD_RECURSION is not set
# CONFIG_FTRACE_STARTUP_TEST is not set
# CONFIG_RING_BUFFER_STARTUP_TEST is not set
# CONFIG_RING_BUFFER_VALIDATE_TIME_DELTAS is not set
# CONFIG_PREEMPTIRQ_DELAY_TEST is not set
# CONFIG_SYNTH_EVENT_GEN_TEST is not set
# CONFIG_KPROBE_EVENT_GEN_TEST is not set
# CONFIG_HIST_TRIGGERS_DEBUG is not set
CONFIG_PROVIDE_OHCI1394_DMA_INIT=y
# CONFIG_SAMPLES is not set
CONFIG_ARCH_HAS_DEVMEM_IS_ALLOWED=y
CONFIG_STRICT_DEVMEM=y
# CONFIG_IO_STRICT_DEVMEM is not set

#
# x86 Debugging
#
CONFIG_TRACE_IRQFLAGS_SUPPORT=y
CONFIG_TRACE_IRQFLAGS_NMI_SUPPORT=y
CONFIG_EARLY_PRINTK_USB=y
CONFIG_X86_VERBOSE_BOOTUP=y
CONFIG_EARLY_PRINTK=y
CONFIG_EARLY_PRINTK_DBGP=y
CONFIG_EARLY_PRINTK_USB_XDBC=y
# CONFIG_EFI_PGT_DUMP is not set
# CONFIG_DEBUG_TLBFLUSH is not set
CONFIG_HAVE_MMIOTRACE_SUPPORT=y
CONFIG_X86_DECODER_SELFTEST=y
CONFIG_IO_DELAY_0X80=y
# CONFIG_IO_DELAY_0XED is not set
# CONFIG_IO_DELAY_UDELAY is not set
# CONFIG_IO_DELAY_NONE is not set
CONFIG_DEBUG_BOOT_PARAMS=y
# CONFIG_CPA_DEBUG is not set
# CONFIG_DEBUG_ENTRY is not set
# CONFIG_DEBUG_NMI_SELFTEST is not set
# CONFIG_X86_DEBUG_FPU is not set
# CONFIG_PUNIT_ATOM_DEBUG is not set
CONFIG_UNWINDER_ORC=y
# CONFIG_UNWINDER_FRAME_POINTER is not set
# end of x86 Debugging

#
# Kernel Testing and Coverage
#
CONFIG_KUNIT=y
# CONFIG_KUNIT_DEBUGFS is not set
CONFIG_KUNIT_TEST=m
CONFIG_KUNIT_EXAMPLE_TEST=m
# CONFIG_KUNIT_ALL_TESTS is not set
# CONFIG_NOTIFIER_ERROR_INJECTION is not set
CONFIG_FUNCTION_ERROR_INJECTION=y
CONFIG_FAULT_INJECTION=y
# CONFIG_FAILSLAB is not set
# CONFIG_FAIL_PAGE_ALLOC is not set
# CONFIG_FAULT_INJECTION_USERCOPY is not set
CONFIG_FAIL_MAKE_REQUEST=y
# CONFIG_FAIL_IO_TIMEOUT is not set
# CONFIG_FAIL_FUTEX is not set
CONFIG_FAULT_INJECTION_DEBUG_FS=y
# CONFIG_FAIL_FUNCTION is not set
# CONFIG_FAIL_MMC_REQUEST is not set
CONFIG_ARCH_HAS_KCOV=y
CONFIG_CC_HAS_SANCOV_TRACE_PC=y
# CONFIG_KCOV is not set
CONFIG_RUNTIME_TESTING_MENU=y
# CONFIG_LKDTM is not set
# CONFIG_TEST_LIST_SORT is not set
# CONFIG_TEST_MIN_HEAP is not set
# CONFIG_TEST_SORT is not set
# CONFIG_KPROBES_SANITY_TEST is not set
# CONFIG_BACKTRACE_SELF_TEST is not set
# CONFIG_RBTREE_TEST is not set
# CONFIG_REED_SOLOMON_TEST is not set
# CONFIG_INTERVAL_TREE_TEST is not set
# CONFIG_PERCPU_TEST is not set
CONFIG_ATOMIC64_SELFTEST=y
# CONFIG_ASYNC_RAID6_TEST is not set
# CONFIG_TEST_HEXDUMP is not set
# CONFIG_TEST_STRING_HELPERS is not set
# CONFIG_TEST_STRSCPY is not set
# CONFIG_TEST_KSTRTOX is not set
# CONFIG_TEST_PRINTF is not set
# CONFIG_TEST_BITMAP is not set
# CONFIG_TEST_UUID is not set
# CONFIG_TEST_XARRAY is not set
# CONFIG_TEST_OVERFLOW is not set
# CONFIG_TEST_RHASHTABLE is not set
# CONFIG_TEST_HASH is not set
# CONFIG_TEST_IDA is not set
# CONFIG_TEST_LKM is not set
# CONFIG_TEST_BITOPS is not set
# CONFIG_TEST_VMALLOC is not set
# CONFIG_TEST_USER_COPY is not set
CONFIG_TEST_BPF=m
# CONFIG_TEST_BLACKHOLE_DEV is not set
# CONFIG_FIND_BIT_BENCHMARK is not set
# CONFIG_TEST_FIRMWARE is not set
# CONFIG_TEST_SYSCTL is not set
# CONFIG_BITFIELD_KUNIT is not set
# CONFIG_RESOURCE_KUNIT_TEST is not set
CONFIG_SYSCTL_KUNIT_TEST=m
CONFIG_LIST_KUNIT_TEST=m
# CONFIG_LINEAR_RANGES_TEST is not set
# CONFIG_CMDLINE_KUNIT_TEST is not set
# CONFIG_BITS_TEST is not set
# CONFIG_TEST_UDELAY is not set
# CONFIG_TEST_STATIC_KEYS is not set
# CONFIG_TEST_KMOD is not set
# CONFIG_TEST_MEMCAT_P is not set
# CONFIG_TEST_LIVEPATCH is not set
# CONFIG_TEST_STACKINIT is not set
# CONFIG_TEST_MEMINIT is not set
# CONFIG_TEST_HMM is not set
# CONFIG_TEST_FREE_PAGES is not set
# CONFIG_TEST_FPU is not set
# CONFIG_MEMTEST is not set
# CONFIG_HYPERV_TESTING is not set
# end of Kernel Testing and Coverage
# end of Kernel hacking

[-- Attachment #3: job-script --]
[-- Type: text/plain, Size: 5940 bytes --]

#!/bin/sh

export_top_env()
{
	export suite='nvml'
	export testcase='nvml'
	export category='functional'
	export branch='linux-review/Michel-Lespinasse/Speculative-page-faults/20210407-095517'
	export test='pmem'
	export group='blk'
	export mount_option='dax'
	export job_origin='nvml-dax.yaml'
	export queue_cmdline_keys='branch
commit
queue_at_least_once'
	export queue='validate'
	export testbox='lkp-bdw-de1'
	export tbox_group='lkp-bdw-de1'
	export kconfig='x86_64-rhel-8.3'
	export submit_id='606dcb528278f756c61e484d'
	export job_file='/lkp/jobs/scheduled/lkp-bdw-de1/nvml-32G_4G-ext4-blk-dax-1-pmem-ucode=0x7000019-debian-10.4-x86_64-20200603.cgz-87b1c39af431a20ab69bdceb9036360cf58a28e4-20210407-22214-jjgd5w-3.yaml'
	export id='a04b219cbbc6b300c886ef1adac12a6ade9ad7a4'
	export queuer_version='/lkp-src'
	export model='Broadwell-DE'
	export nr_node=1
	export nr_cpu=16
	export memory='48G'
	export nr_hdd_partitions=1
	export nr_ssd_partitions=1
	export ssd_partitions='/dev/disk/by-id/ata-INTEL_SSDSC2BA800G4_BTHV410402GY800OGN-part2'
	export hdd_partitions='/dev/disk/by-id/ata-ST9500620NS_9XF26EB5-part1'
	export swap_partitions=
	export rootfs_partition='/dev/disk/by-id/ata-INTEL_SSDSC2BA800G4_BTHV410402GY800OGN-part1'
	export brand='Intel(R) Xeon(R) CPU D-1541 @ 2.10GHz'
	export need_kconfig='CONFIG_NVDIMM_PFN=y
CONFIG_FS_DAX=y
CONFIG_LIBNVDIMM
CONFIG_BTT
CONFIG_BLK_DEV_PMEM
CONFIG_X86_PMEM_LEGACY
CONFIG_EXT4_FS'
	export commit='87b1c39af431a20ab69bdceb9036360cf58a28e4'
	export ucode='0x7000019'
	export need_kconfig_hw='CONFIG_IGB=y
CONFIG_NETDEVICES=y
CONFIG_ETHERNET=y
CONFIG_NET_VENDOR_INTEL=y
CONFIG_PCI=y
CONFIG_SATA_AHCI
CONFIG_SATA_AHCI_PLATFORM
CONFIG_ATA
CONFIG_HAS_DMA=y'
	export bisect_dmesg=true
	export enqueue_time='2021-04-07 23:10:11 +0800'
	export _id='606dcb568278f756c61e484f'
	export _rt='/result/nvml/32G_4G-ext4-blk-dax-1-pmem-ucode=0x7000019/lkp-bdw-de1/debian-10.4-x86_64-20200603.cgz/x86_64-rhel-8.3/gcc-9/87b1c39af431a20ab69bdceb9036360cf58a28e4'
	export user='lkp'
	export compiler='gcc-9'
	export LKP_SERVER='internal-lkp-server'
	export head_commit='fa4e37568c8a98790eeac732824e7304327c2e85'
	export base_commit='e49d033bddf5b565044e2abe4241353959bc9120'
	export rootfs='debian-10.4-x86_64-20200603.cgz'
	export result_root='/result/nvml/32G_4G-ext4-blk-dax-1-pmem-ucode=0x7000019/lkp-bdw-de1/debian-10.4-x86_64-20200603.cgz/x86_64-rhel-8.3/gcc-9/87b1c39af431a20ab69bdceb9036360cf58a28e4/3'
	export scheduler_version='/lkp/lkp/.src-20210406-184939'
	export arch='x86_64'
	export max_uptime=2100
	export initrd='/osimage/debian/debian-10.4-x86_64-20200603.cgz'
	export bootloader_append='root=/dev/ram0
user=lkp
job=/lkp/jobs/scheduled/lkp-bdw-de1/nvml-32G_4G-ext4-blk-dax-1-pmem-ucode=0x7000019-debian-10.4-x86_64-20200603.cgz-87b1c39af431a20ab69bdceb9036360cf58a28e4-20210407-22214-jjgd5w-3.yaml
ARCH=x86_64
kconfig=x86_64-rhel-8.3
branch=linux-review/Michel-Lespinasse/Speculative-page-faults/20210407-095517
commit=87b1c39af431a20ab69bdceb9036360cf58a28e4
BOOT_IMAGE=/pkg/linux/x86_64-rhel-8.3/gcc-9/87b1c39af431a20ab69bdceb9036360cf58a28e4/vmlinuz-5.12.0-rc2-00042-g87b1c39af431
memmap=32G!4G
max_uptime=2100
RESULT_ROOT=/result/nvml/32G_4G-ext4-blk-dax-1-pmem-ucode=0x7000019/lkp-bdw-de1/debian-10.4-x86_64-20200603.cgz/x86_64-rhel-8.3/gcc-9/87b1c39af431a20ab69bdceb9036360cf58a28e4/3
LKP_SERVER=internal-lkp-server
nokaslr
selinux=0
debug
apic=debug
sysrq_always_enabled
rcupdate.rcu_cpu_stall_timeout=100
net.ifnames=0
printk.devkmsg=on
panic=-1
softlockup_panic=1
nmi_watchdog=panic
oops=panic
load_ramdisk=2
prompt_ramdisk=0
drbd.minor_count=8
earlyprintk=ttyS0,115200
systemd.log_level=err
console=ttyS0,115200
console=tty0
rw'
	export modules_initrd='/pkg/linux/x86_64-rhel-8.3/gcc-9/87b1c39af431a20ab69bdceb9036360cf58a28e4/modules.cgz'
	export bm_initrd='/osimage/deps/debian-10.4-x86_64-20200603.cgz/run-ipconfig_20200608.cgz,/osimage/deps/debian-10.4-x86_64-20200603.cgz/lkp_20201211.cgz,/osimage/deps/debian-10.4-x86_64-20200603.cgz/rsync-rootfs_20200608.cgz,/osimage/deps/debian-10.4-x86_64-20200603.cgz/nvml_20210402.cgz,/osimage/pkg/debian-10.4-x86_64-20200603.cgz/nvml-x86_64-09f75f696-1_20210402.cgz,/osimage/deps/debian-10.4-x86_64-20200603.cgz/fs_20200714.cgz,/osimage/deps/debian-10.4-x86_64-20200603.cgz/hw_20200715.cgz'
	export ucode_initrd='/osimage/ucode/intel-ucode-20210222.cgz'
	export lkp_initrd='/osimage/user/lkp/lkp-x86_64.cgz'
	export site='inn'
	export LKP_CGI_PORT=80
	export LKP_CIFS_PORT=139
	export last_kernel='5.12.0-rc6-01593-gfa4e37568c8a'
	export repeat_to=6
	export queue_at_least_once=1
	export kernel='/pkg/linux/x86_64-rhel-8.3/gcc-9/87b1c39af431a20ab69bdceb9036360cf58a28e4/vmlinuz-5.12.0-rc2-00042-g87b1c39af431'
	export dequeue_time='2021-04-07 23:35:36 +0800'
	export job_initrd='/lkp/jobs/scheduled/lkp-bdw-de1/nvml-32G_4G-ext4-blk-dax-1-pmem-ucode=0x7000019-debian-10.4-x86_64-20200603.cgz-87b1c39af431a20ab69bdceb9036360cf58a28e4-20210407-22214-jjgd5w-3.cgz'

	[ -n "$LKP_SRC" ] ||
	export LKP_SRC=/lkp/${user:-lkp}/src
}

run_job()
{
	echo $$ > $TMP/run-job.pid

	. $LKP_SRC/lib/http.sh
	. $LKP_SRC/lib/job.sh
	. $LKP_SRC/lib/env.sh

	export_top_env

	run_setup nr_pmem=1 $LKP_SRC/setup/disk

	run_setup fs='ext4' $LKP_SRC/setup/fs

	run_setup bp_memmap='32G!4G' $LKP_SRC/setup/boot_params

	run_monitor $LKP_SRC/monitors/wrapper kmsg
	run_monitor $LKP_SRC/monitors/wrapper heartbeat
	run_monitor $LKP_SRC/monitors/wrapper meminfo
	run_monitor $LKP_SRC/monitors/wrapper oom-killer
	run_monitor $LKP_SRC/monitors/plain/watchdog

	run_test $LKP_SRC/tests/wrapper nvml
}

extract_stats()
{
	export stats_part_begin=
	export stats_part_end=

	$LKP_SRC/stats/wrapper nvml
	$LKP_SRC/stats/wrapper kmsg
	$LKP_SRC/stats/wrapper meminfo

	$LKP_SRC/stats/wrapper time nvml.time
	$LKP_SRC/stats/wrapper dmesg
	$LKP_SRC/stats/wrapper kmsg
	$LKP_SRC/stats/wrapper last_state
	$LKP_SRC/stats/wrapper stderr
	$LKP_SRC/stats/wrapper time
}

"$@"

[-- Attachment #4: kmsg.xz --]
[-- Type: application/x-xz, Size: 29936 bytes --]

[-- Attachment #5: job.yaml --]
[-- Type: text/plain, Size: 4869 bytes --]

---

#! jobs/nvml-dax.yaml
suite: nvml
testcase: nvml
category: functional
branch: linux-devel/devel-hourly-20210407-100137
nvml: 
test: pmem
group: blk
disk:
  nr_pmem: 1
fs: ext4
mount_option: dax
boot_params:
  bp_memmap: 32G!4G
job_origin: nvml-dax.yaml

#! queue options
queue_cmdline_keys:
- branch
- commit
queue: bisect
testbox: lkp-bdw-de1
tbox_group: lkp-bdw-de1
kconfig: x86_64-rhel-8.3
submit_id: 606dc3bd8278f752f7d40a17
job_file: "/lkp/jobs/scheduled/lkp-bdw-de1/nvml-32G_4G-ext4-blk-dax-1-pmem-ucode=0x7000019-debian-10.4-x86_64-20200603.cgz-87b1c39af431a20ab69bdceb9036360cf58a28e4-20210407-21239-1hu8yxh-0.yaml"
id: 46c2bfb03889a7f098c705bd60794361f05cac87
queuer_version: "/lkp-src"

#! hosts/lkp-bdw-de1
model: Broadwell-DE
nr_node: 1
nr_cpu: 16
memory: 48G
nr_hdd_partitions: 1
nr_ssd_partitions: 1
ssd_partitions: "/dev/disk/by-id/ata-INTEL_SSDSC2BA800G4_BTHV410402GY800OGN-part2"
hdd_partitions: "/dev/disk/by-id/ata-ST9500620NS_9XF26EB5-part1"
swap_partitions: 
rootfs_partition: "/dev/disk/by-id/ata-INTEL_SSDSC2BA800G4_BTHV410402GY800OGN-part1"
brand: Intel(R) Xeon(R) CPU D-1541 @ 2.10GHz

#! include/category/functional
kmsg: 
heartbeat: 
meminfo: 

#! include/nvml
need_kconfig:
- CONFIG_NVDIMM_PFN=y
- CONFIG_FS_DAX=y
- CONFIG_LIBNVDIMM
- CONFIG_BTT
- CONFIG_BLK_DEV_PMEM
- CONFIG_X86_PMEM_LEGACY
- CONFIG_EXT4_FS

#! include/disk/nr_pmem

#! include/fs/OTHERS

#! include/queue/cyclic
commit: 87b1c39af431a20ab69bdceb9036360cf58a28e4

#! include/testbox/lkp-bdw-de1
ucode: '0x7000019'
need_kconfig_hw:
- CONFIG_IGB=y
- CONFIG_NETDEVICES=y
- CONFIG_ETHERNET=y
- CONFIG_NET_VENDOR_INTEL=y
- CONFIG_PCI=y
- CONFIG_SATA_AHCI
- CONFIG_SATA_AHCI_PLATFORM
- CONFIG_ATA
- CONFIG_HAS_DMA=y
bisect_dmesg: true
enqueue_time: 2021-04-07 22:37:49.745446411 +08:00
_id: 606dc3bd8278f752f7d40a17
_rt: "/result/nvml/32G_4G-ext4-blk-dax-1-pmem-ucode=0x7000019/lkp-bdw-de1/debian-10.4-x86_64-20200603.cgz/x86_64-rhel-8.3/gcc-9/87b1c39af431a20ab69bdceb9036360cf58a28e4"

#! schedule options
user: lkp
compiler: gcc-9
LKP_SERVER: internal-lkp-server
head_commit: fa4e37568c8a98790eeac732824e7304327c2e85
base_commit: e49d033bddf5b565044e2abe4241353959bc9120
rootfs: debian-10.4-x86_64-20200603.cgz
result_root: "/result/nvml/32G_4G-ext4-blk-dax-1-pmem-ucode=0x7000019/lkp-bdw-de1/debian-10.4-x86_64-20200603.cgz/x86_64-rhel-8.3/gcc-9/87b1c39af431a20ab69bdceb9036360cf58a28e4/0"
scheduler_version: "/lkp/lkp/.src-20210406-184939"
arch: x86_64
max_uptime: 2100
initrd: "/osimage/debian/debian-10.4-x86_64-20200603.cgz"
bootloader_append:
- root=/dev/ram0
- user=lkp
- job=/lkp/jobs/scheduled/lkp-bdw-de1/nvml-32G_4G-ext4-blk-dax-1-pmem-ucode=0x7000019-debian-10.4-x86_64-20200603.cgz-87b1c39af431a20ab69bdceb9036360cf58a28e4-20210407-21239-1hu8yxh-0.yaml
- ARCH=x86_64
- kconfig=x86_64-rhel-8.3
- branch=linux-devel/devel-hourly-20210407-100137
- commit=87b1c39af431a20ab69bdceb9036360cf58a28e4
- BOOT_IMAGE=/pkg/linux/x86_64-rhel-8.3/gcc-9/87b1c39af431a20ab69bdceb9036360cf58a28e4/vmlinuz-5.12.0-rc2-00042-g87b1c39af431
- memmap=32G!4G
- max_uptime=2100
- RESULT_ROOT=/result/nvml/32G_4G-ext4-blk-dax-1-pmem-ucode=0x7000019/lkp-bdw-de1/debian-10.4-x86_64-20200603.cgz/x86_64-rhel-8.3/gcc-9/87b1c39af431a20ab69bdceb9036360cf58a28e4/0
- LKP_SERVER=internal-lkp-server
- nokaslr
- selinux=0
- debug
- apic=debug
- sysrq_always_enabled
- rcupdate.rcu_cpu_stall_timeout=100
- net.ifnames=0
- printk.devkmsg=on
- panic=-1
- softlockup_panic=1
- nmi_watchdog=panic
- oops=panic
- load_ramdisk=2
- prompt_ramdisk=0
- drbd.minor_count=8
- earlyprintk=ttyS0,115200
- systemd.log_level=err
- console=ttyS0,115200
- console=tty0
- rw
modules_initrd: "/pkg/linux/x86_64-rhel-8.3/gcc-9/87b1c39af431a20ab69bdceb9036360cf58a28e4/modules.cgz"
bm_initrd: "/osimage/deps/debian-10.4-x86_64-20200603.cgz/run-ipconfig_20200608.cgz,/osimage/deps/debian-10.4-x86_64-20200603.cgz/lkp_20201211.cgz,/osimage/deps/debian-10.4-x86_64-20200603.cgz/rsync-rootfs_20200608.cgz,/osimage/deps/debian-10.4-x86_64-20200603.cgz/nvml_20210402.cgz,/osimage/pkg/debian-10.4-x86_64-20200603.cgz/nvml-x86_64-09f75f696-1_20210402.cgz,/osimage/deps/debian-10.4-x86_64-20200603.cgz/fs_20200714.cgz,/osimage/deps/debian-10.4-x86_64-20200603.cgz/hw_20200715.cgz"
ucode_initrd: "/osimage/ucode/intel-ucode-20210222.cgz"
lkp_initrd: "/osimage/user/lkp/lkp-x86_64.cgz"
site: inn

#! /lkp/lkp/.src-20210406-184939/include/site/inn
LKP_CGI_PORT: 80
LKP_CIFS_PORT: 139
oom-killer: 
watchdog: 

#! runtime status
last_kernel: 5.12.0-rc6-03775-g010e4d0e7d40

#! user overrides
kernel: "/pkg/linux/x86_64-rhel-8.3/gcc-9/87b1c39af431a20ab69bdceb9036360cf58a28e4/vmlinuz-5.12.0-rc2-00042-g87b1c39af431"
dequeue_time: 2021-04-07 23:00:39.176726796 +08:00
job_state: finished
loadavg: 1.87 1.65 0.85 2/227 19537
start_time: '1617807715'
end_time: '1617808150'
version: "/lkp/lkp/.src-20210406-185009:e6cf17f6:a31ccea83"

[-- Attachment #6: reproduce --]
[-- Type: text/plain, Size: 2237 bytes --]

 "modprobe" "nd_e820"
dmsetup remove_all
wipefs -a --force /dev/pmem0
mkfs -t ext4 -q -F /dev/pmem0
mkdir -p /fs/pmem0
mount -t ext4 -o dax /dev/pmem0 /fs/pmem0
cd /lkp/benchmarks/nvml/src/test
export CC=clang
export CXX=clang++
cd /lkp/benchmarks/nvml
export CC=clang
export CXX=clang++
cp src/test/testconfig.py.example src/test/testconfig.py
export OS_DIMM=ndctl
make EXTRA_CFLAGS=-DPAGE_SIZE=4096 -DUSE_VALGRIND USE_LLVM_LIBCPP=1 LIBCPP_INCDIR=/usr/local/libcxx/include/c++/v1/ LIBCPP_LIBDIR=/usr/local/libcxx/lib
make EXTRA_CFLAGS=-DPAGE_SIZE=4096 -DUSE_VALGRIND USE_LLVM_LIBCPP=1 LIBCPP_INCDIR=/usr/local/libcxx/include/c++/v1/ LIBCPP_LIBDIR=/usr/local/libcxx/lib test
cd /lkp/benchmarks/nvml/src/test
ssh-keygen -t rsa -P  -f /root/.ssh/id_rsa
cat /root/.ssh/id_rsa.pub
cd /lkp/benchmarks/nvml/src
make EXTRA_CFLAGS=-DUSE_VALGRIND USE_LLVM_LIBCPP=1 LIBCPP_INCDIR=/usr/local/libcxx/include/c++/v1/ LIBCPP_LIBDIR=/usr/local/libcxx/lib -C libpmem DEBUG=1
make EXTRA_CFLAGS=-DUSE_VALGRIND USE_LLVM_LIBCPP=1 LIBCPP_INCDIR=/usr/local/libcxx/include/c++/v1/ LIBCPP_LIBDIR=/usr/local/libcxx/lib -C libpmem DEBUG=0
make EXTRA_CFLAGS=-DUSE_VALGRIND USE_LLVM_LIBCPP=1 LIBCPP_INCDIR=/usr/local/libcxx/include/c++/v1/ LIBCPP_LIBDIR=/usr/local/libcxx/lib -C libpmem2 DEBUG=1
make EXTRA_CFLAGS=-DUSE_VALGRIND USE_LLVM_LIBCPP=1 LIBCPP_INCDIR=/usr/local/libcxx/include/c++/v1/ LIBCPP_LIBDIR=/usr/local/libcxx/lib -C libpmem2 DEBUG=0
make EXTRA_CFLAGS=-DUSE_VALGRIND USE_LLVM_LIBCPP=1 LIBCPP_INCDIR=/usr/local/libcxx/include/c++/v1/ LIBCPP_LIBDIR=/usr/local/libcxx/lib -C common DEBUG=1
make EXTRA_CFLAGS=-DUSE_VALGRIND USE_LLVM_LIBCPP=1 LIBCPP_INCDIR=/usr/local/libcxx/include/c++/v1/ LIBCPP_LIBDIR=/usr/local/libcxx/lib -C common DEBUG=0
cd -
make sync-remotes FORCE_SYNC_REMOTE=y USE_LLVM_LIBCPP=1 LIBCPP_INCDIR=/usr/local/libcxx/include/c++/v1 LIBCPP_LIBDIR=/usr/local/libcxx/lib
cd /lkp/benchmarks/nvml/src/test
export CXX=g++
ln -sf /usr/local/bin/ndctl /usr/bin/ndctl
./RUNTESTS -f pmem blk_include
./RUNTESTS -f pmem blk_nblock
./RUNTESTS -f pmem blk_non_zero
./RUNTESTS -f pmem blk_pool
./RUNTESTS -f pmem blk_pool_lock
./RUNTESTS -f pmem blk_pool_win
./RUNTESTS -f pmem blk_recovery
./RUNTESTS -f pmem blk_rw
./RUNTESTS -f pmem blk_rw_mt

[-- Attachment #7: nvml.xz --]
[-- Type: application/x-xz, Size: 46088 bytes --]

[RFC PATCH 24/37] mm: implement speculative handling in __do_fault()

[Michel Lespinasse]

In the speculative case, call the vm_ops->fault() method from within
an rcu read locked section, and verify the mmap sequence lock at the
start of the section. A match guarantees that the original vma is still
valid at that time, and that the associated vma->vm_file stays valid
while the vm_ops->fault() method is running.

Note that this implies that speculative faults can not sleep within
the vm_ops->fault method. We will only attempt to fetch existing pages
from the page cache during speculative faults; any miss (or prefetch)
will be handled by falling back to non-speculative fault handling.

The speculative handling case also does not preallocate page tables,
as it is always called with a pre-existing page table.

Signed-off-by: Michel Lespinasse <michel@lespinasse.org>
---
 mm/memory.c | 63 +++++++++++++++++++++++++++++++++++------------------
 1 file changed, 42 insertions(+), 21 deletions(-)

diff --git a/mm/memory.c b/mm/memory.c
index 6eddd7b4e89c..7139004c624d 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -3709,29 +3709,50 @@ static vm_fault_t __do_fault(struct vm_fault *vmf)
 	struct vm_area_struct *vma = vmf->vma;
 	vm_fault_t ret;
 
-	/*
-	 * Preallocate pte before we take page_lock because this might lead to
-	 * deadlocks for memcg reclaim which waits for pages under writeback:
-	 *				lock_page(A)
-	 *				SetPageWriteback(A)
-	 *				unlock_page(A)
-	 * lock_page(B)
-	 *				lock_page(B)
-	 * pte_alloc_one
-	 *   shrink_page_list
-	 *     wait_on_page_writeback(A)
-	 *				SetPageWriteback(B)
-	 *				unlock_page(B)
-	 *				# flush A, B to clear the writeback
-	 */
-	if (pmd_none(*vmf->pmd) && !vmf->prealloc_pte) {
-		vmf->prealloc_pte = pte_alloc_one(vma->vm_mm);
-		if (!vmf->prealloc_pte)
-			return VM_FAULT_OOM;
-		smp_wmb(); /* See comment in __pte_alloc() */
+#ifdef CONFIG_SPECULATIVE_PAGE_FAULT
+	if (vmf->flags & FAULT_FLAG_SPECULATIVE) {
+		rcu_read_lock();
+		if (!mmap_seq_read_check(vmf->vma->vm_mm, vmf->seq)) {
+			ret = VM_FAULT_RETRY;
+		} else {
+			/*
+			 * The mmap sequence count check guarantees that the
+			 * vma we fetched at the start of the fault was still
+			 * current at that point in time. The rcu read lock
+			 * ensures vmf->vma->vm_file stays valid.
+			 */
+			ret = vma->vm_ops->fault(vmf);
+		}
+		rcu_read_unlock();
+	} else
+#endif
+	{
+		/*
+		 * Preallocate pte before we take page_lock because
+		 * this might lead to deadlocks for memcg reclaim
+		 * which waits for pages under writeback:
+		 *				lock_page(A)
+		 *				SetPageWriteback(A)
+		 *				unlock_page(A)
+		 * lock_page(B)
+		 *				lock_page(B)
+		 * pte_alloc_one
+		 *   shrink_page_list
+		 *     wait_on_page_writeback(A)
+		 *				SetPageWriteback(B)
+		 *				unlock_page(B)
+		 *				# flush A, B to clear writeback
+		 */
+		if (pmd_none(*vmf->pmd) && !vmf->prealloc_pte) {
+			vmf->prealloc_pte = pte_alloc_one(vma->vm_mm);
+			if (!vmf->prealloc_pte)
+				return VM_FAULT_OOM;
+			smp_wmb(); /* See comment in __pte_alloc() */
+		}
+
+		ret = vma->vm_ops->fault(vmf);
 	}
 
-	ret = vma->vm_ops->fault(vmf);
 	if (unlikely(ret & (VM_FAULT_ERROR | VM_FAULT_NOPAGE | VM_FAULT_RETRY |
 			    VM_FAULT_DONE_COW)))
 		return ret;
-- 
2.20.1

Re: [RFC PATCH 24/37] mm: implement speculative handling in __do_fault()

[Matthew Wilcox]

On Tue, Apr 06, 2021 at 06:44:49PM -0700, Michel Lespinasse wrote:
> In the speculative case, call the vm_ops->fault() method from within
> an rcu read locked section, and verify the mmap sequence lock at the
> start of the section. A match guarantees that the original vma is still
> valid at that time, and that the associated vma->vm_file stays valid
> while the vm_ops->fault() method is running.
> 
> Note that this implies that speculative faults can not sleep within
> the vm_ops->fault method. We will only attempt to fetch existing pages
> from the page cache during speculative faults; any miss (or prefetch)
> will be handled by falling back to non-speculative fault handling.
> 
> The speculative handling case also does not preallocate page tables,
> as it is always called with a pre-existing page table.

I still don't understand why you want to do this.  The speculative
fault that doesn't do I/O is already here, and it's called ->map_pages
(which I see you also do later).  So what's the point of this patch?

Re: [RFC PATCH 24/37] mm: implement speculative handling in __do_fault()

[Michel Lespinasse]

On Wed, Apr 07, 2021 at 03:35:27AM +0100, Matthew Wilcox wrote:
> On Tue, Apr 06, 2021 at 06:44:49PM -0700, Michel Lespinasse wrote:
> > In the speculative case, call the vm_ops->fault() method from within
> > an rcu read locked section, and verify the mmap sequence lock at the
> > start of the section. A match guarantees that the original vma is still
> > valid at that time, and that the associated vma->vm_file stays valid
> > while the vm_ops->fault() method is running.
> > 
> > Note that this implies that speculative faults can not sleep within
> > the vm_ops->fault method. We will only attempt to fetch existing pages
> > from the page cache during speculative faults; any miss (or prefetch)
> > will be handled by falling back to non-speculative fault handling.
> > 
> > The speculative handling case also does not preallocate page tables,
> > as it is always called with a pre-existing page table.
> 
> I still don't understand why you want to do this.  The speculative
> fault that doesn't do I/O is already here, and it's called ->map_pages
> (which I see you also do later).  So what's the point of this patch?

I have to admit I did not give much tought about which path would be
generally most common here.

The speculative vm_ops->fault path would be used:
- for private mapping write faults,
- when fault-around is disabled (probably an uncommon case in general,
  but actually common at Google).

That said, I do think your point makes sense in general, espicially if
this could help avoid the per-filesystem enable bit.

Re: [RFC PATCH 24/37] mm: implement speculative handling in __do_fault()

[Matthew Wilcox]

On Tue, Apr 06, 2021 at 07:53:20PM -0700, Michel Lespinasse wrote:
> On Wed, Apr 07, 2021 at 03:35:27AM +0100, Matthew Wilcox wrote:
> > On Tue, Apr 06, 2021 at 06:44:49PM -0700, Michel Lespinasse wrote:
> > > In the speculative case, call the vm_ops->fault() method from within
> > > an rcu read locked section, and verify the mmap sequence lock at the
> > > start of the section. A match guarantees that the original vma is still
> > > valid at that time, and that the associated vma->vm_file stays valid
> > > while the vm_ops->fault() method is running.
> > > 
> > > Note that this implies that speculative faults can not sleep within
> > > the vm_ops->fault method. We will only attempt to fetch existing pages
> > > from the page cache during speculative faults; any miss (or prefetch)
> > > will be handled by falling back to non-speculative fault handling.
> > > 
> > > The speculative handling case also does not preallocate page tables,
> > > as it is always called with a pre-existing page table.
> > 
> > I still don't understand why you want to do this.  The speculative
> > fault that doesn't do I/O is already here, and it's called ->map_pages
> > (which I see you also do later).  So what's the point of this patch?
> 
> I have to admit I did not give much tought about which path would be
> generally most common here.
> 
> The speculative vm_ops->fault path would be used:
> - for private mapping write faults,
> - when fault-around is disabled (probably an uncommon case in general,
>   but actually common at Google).

Why is it disabled?  The PTE table is already being allocated and filled
... why not quickly check the page cache to see if there are other pages
within this 2MB range and fill in their PTEs too?  Even if only one
of them is ever hit, the reduction in page faults is surely worth it.
Obviously if your workload has such non-locality that you hit only one
page in a 2MB range and then no other, it'll lose ... but then you have
a really badly designed workload!

> That said, I do think your point makes sense in general, espicially if
> this could help avoid the per-filesystem enable bit.

Re: [RFC PATCH 24/37] mm: implement speculative handling in __do_fault()

[Peter Zijlstra]

On Tue, Apr 06, 2021 at 06:44:49PM -0700, Michel Lespinasse wrote:
> In the speculative case, call the vm_ops->fault() method from within
> an rcu read locked section, and verify the mmap sequence lock at the
> start of the section. A match guarantees that the original vma is still
> valid at that time, and that the associated vma->vm_file stays valid
> while the vm_ops->fault() method is running.
> 
> Note that this implies that speculative faults can not sleep within
> the vm_ops->fault method. We will only attempt to fetch existing pages
> from the page cache during speculative faults; any miss (or prefetch)
> will be handled by falling back to non-speculative fault handling.
> 
> The speculative handling case also does not preallocate page tables,
> as it is always called with a pre-existing page table.

So what's wrong with SRCU ? Laurent mumbled something about frequent
SRCU kthread activity being a problem; is that still so and is that
fundamentally unfixable?

Because to me it seems a much more natural solution to the whole thing.

Re: [RFC PATCH 24/37] mm: implement speculative handling in __do_fault()

[Michel Lespinasse]

On Wed, Apr 07, 2021 at 04:40:34PM +0200, Peter Zijlstra wrote:
> On Tue, Apr 06, 2021 at 06:44:49PM -0700, Michel Lespinasse wrote:
> > In the speculative case, call the vm_ops->fault() method from within
> > an rcu read locked section, and verify the mmap sequence lock at the
> > start of the section. A match guarantees that the original vma is still
> > valid at that time, and that the associated vma->vm_file stays valid
> > while the vm_ops->fault() method is running.
> > 
> > Note that this implies that speculative faults can not sleep within
> > the vm_ops->fault method. We will only attempt to fetch existing pages
> > from the page cache during speculative faults; any miss (or prefetch)
> > will be handled by falling back to non-speculative fault handling.
> > 
> > The speculative handling case also does not preallocate page tables,
> > as it is always called with a pre-existing page table.
> 
> So what's wrong with SRCU ? Laurent mumbled something about frequent
> SRCU kthread activity being a problem; is that still so and is that
> fundamentally unfixable?
> 
> Because to me it seems a much more natural solution to the whole thing.

The short answer is that I did not try SRCU. My thought process was,
page cache already uses an RCU read lock, I just need to expand its
scope a little.

Using SRCU might allow us to hit disk during speculative faults; OTOH
we may need to switch to a more robust validation mechanism than the
global counter to reap any benefits.

Re: [RFC PATCH 24/37] mm: implement speculative handling in __do_fault()

[Matthew Wilcox]

On Wed, Apr 07, 2021 at 02:20:27PM -0700, Michel Lespinasse wrote:
> On Wed, Apr 07, 2021 at 04:40:34PM +0200, Peter Zijlstra wrote:
> > On Tue, Apr 06, 2021 at 06:44:49PM -0700, Michel Lespinasse wrote:
> > > In the speculative case, call the vm_ops->fault() method from within
> > > an rcu read locked section, and verify the mmap sequence lock at the
> > > start of the section. A match guarantees that the original vma is still
> > > valid at that time, and that the associated vma->vm_file stays valid
> > > while the vm_ops->fault() method is running.
> > > 
> > > Note that this implies that speculative faults can not sleep within
> > > the vm_ops->fault method. We will only attempt to fetch existing pages
> > > from the page cache during speculative faults; any miss (or prefetch)
> > > will be handled by falling back to non-speculative fault handling.
> > > 
> > > The speculative handling case also does not preallocate page tables,
> > > as it is always called with a pre-existing page table.
> > 
> > So what's wrong with SRCU ? Laurent mumbled something about frequent
> > SRCU kthread activity being a problem; is that still so and is that
> > fundamentally unfixable?
> > 
> > Because to me it seems a much more natural solution to the whole thing.
> 
> The short answer is that I did not try SRCU. My thought process was,
> page cache already uses an RCU read lock, I just need to expand its
> scope a little.
> 
> Using SRCU might allow us to hit disk during speculative faults; OTOH
> we may need to switch to a more robust validation mechanism than the
> global counter to reap any benefits.

Why would you want to do I/O under SRCU?!  The benefit of SRCU is that
you can allocate page tables under SRCU.

Doing I/O without any lock held already works; it just uses the file
refcount.  It would be better to use a vma refcount, as I already said.

Re: [RFC PATCH 24/37] mm: implement speculative handling in __do_fault()

[Peter Zijlstra]

On Wed, Apr 07, 2021 at 10:27:12PM +0100, Matthew Wilcox wrote:
> Doing I/O without any lock held already works; it just uses the file
> refcount.  It would be better to use a vma refcount, as I already said.

The original workload that I developed SPF for (waaaay back when) was
prefaulting a single huge vma. Using a vma refcount was a total loss
because it resulted in the same cacheline contention that down_read()
was having.

As such, I'm always incredibly sad to see mention of vma refcounts.
They're fundamentally not solving the problem :/

Re: [RFC PATCH 24/37] mm: implement speculative handling in __do_fault()

[Matthew Wilcox]

On Thu, Apr 08, 2021 at 09:00:26AM +0200, Peter Zijlstra wrote:
> On Wed, Apr 07, 2021 at 10:27:12PM +0100, Matthew Wilcox wrote:
> > Doing I/O without any lock held already works; it just uses the file
> > refcount.  It would be better to use a vma refcount, as I already said.
> 
> The original workload that I developed SPF for (waaaay back when) was
> prefaulting a single huge vma. Using a vma refcount was a total loss
> because it resulted in the same cacheline contention that down_read()
> was having.
> 
> As such, I'm always incredibly sad to see mention of vma refcounts.
> They're fundamentally not solving the problem :/

OK, let me outline my locking scheme because I think it's rather better
than Michel's.  The vma refcount is the slow path.

1. take the RCU read lock
2. walk the pgd/p4d/pud/pmd
3. allocate page tables if necessary.  *handwave GFP flags*.
4. walk the vma tree
5. call ->map_pages
6. take ptlock
7. insert page(s)
8. drop ptlock
if this all worked out, we're done, drop the RCU read lock and return.
9. increment vma refcount
10. drop RCU read lock
11. call ->fault
12. decrement vma refcount

Compared to today, where we bump the refcount on the file underlying the
vma, this is _better_ scalability -- different mappings of the same file
will not contend on the file's refcount.

I suspect your huge VMA was anon, and that wouldn't need a vma refcount
as faulting in new pages doesn't need to do I/O, just drop the RCU
lock, allocate and retry.

Re: [RFC PATCH 24/37] mm: implement speculative handling in __do_fault()

[Peter Zijlstra]

On Thu, Apr 08, 2021 at 08:13:43AM +0100, Matthew Wilcox wrote:
> On Thu, Apr 08, 2021 at 09:00:26AM +0200, Peter Zijlstra wrote:
> > On Wed, Apr 07, 2021 at 10:27:12PM +0100, Matthew Wilcox wrote:
> > > Doing I/O without any lock held already works; it just uses the file
> > > refcount.  It would be better to use a vma refcount, as I already said.
> > 
> > The original workload that I developed SPF for (waaaay back when) was
> > prefaulting a single huge vma. Using a vma refcount was a total loss
> > because it resulted in the same cacheline contention that down_read()
> > was having.
> > 
> > As such, I'm always incredibly sad to see mention of vma refcounts.
> > They're fundamentally not solving the problem :/
> 
> OK, let me outline my locking scheme because I think it's rather better
> than Michel's.  The vma refcount is the slow path.
> 
> 1. take the RCU read lock
> 2. walk the pgd/p4d/pud/pmd
> 3. allocate page tables if necessary.  *handwave GFP flags*.

The problem with allocating page-tables was that you can race with
zap_page_range() if you're not holding mmap_sem, and as such can install
a page-table after, in which case it leaks.

IIRC that was solvable, but it did need a bit of care.

> 4. walk the vma tree
> 5. call ->map_pages

I can't remember ->map_pages().. I think that's 'new'. git-blame tells
me that's 2014, and I did the original SPF in 2010.

Yes, that looks like a useful thing to have, it does the non-blocking
part of ->fault().

I suppose the thing missing here is that if ->map_pages() does not
return a page, we have:

  goto 9

> 6. take ptlock
> 7. insert page(s)
> 8. drop ptlock
> if this all worked out, we're done, drop the RCU read lock and return.

> 9. increment vma refcount
> 10. drop RCU read lock
> 11. call ->fault
> 12. decrement vma refcount

And here we do 6-8 again, right?

> Compared to today, where we bump the refcount on the file underlying the
> vma, this is _better_ scalability -- different mappings of the same file
> will not contend on the file's refcount.
>
> I suspect your huge VMA was anon, and that wouldn't need a vma refcount
> as faulting in new pages doesn't need to do I/O, just drop the RCU
> lock, allocate and retry.

IIRC yes, it was either a huge matrix setup or some database thing, I
can't remember. But the thing was, we didn't have that ->map_pages(), so
we had to call ->fault(), which can sleep, so I had to use SRCU across
the whole thing (or rather, I hacked up preemptible-rcu, because SRCU
was super primitive back then). It did kick start significant SRCU
rework IIRC. Anyway, that's all ancient history.

Re: [RFC PATCH 24/37] mm: implement speculative handling in __do_fault()

[Michel Lespinasse]

On Thu, Apr 08, 2021 at 08:13:43AM +0100, Matthew Wilcox wrote:
> On Thu, Apr 08, 2021 at 09:00:26AM +0200, Peter Zijlstra wrote:
> > On Wed, Apr 07, 2021 at 10:27:12PM +0100, Matthew Wilcox wrote:
> > > Doing I/O without any lock held already works; it just uses the file
> > > refcount.  It would be better to use a vma refcount, as I already said.
> > 
> > The original workload that I developed SPF for (waaaay back when) was
> > prefaulting a single huge vma. Using a vma refcount was a total loss
> > because it resulted in the same cacheline contention that down_read()
> > was having.
> > 
> > As such, I'm always incredibly sad to see mention of vma refcounts.
> > They're fundamentally not solving the problem :/
> 
> OK, let me outline my locking scheme because I think it's rather better
> than Michel's.  The vma refcount is the slow path.
> 
> 1. take the RCU read lock
> 2. walk the pgd/p4d/pud/pmd
> 3. allocate page tables if necessary.  *handwave GFP flags*.
> 4. walk the vma tree
> 5. call ->map_pages
> 6. take ptlock
> 7. insert page(s)
> 8. drop ptlock
> if this all worked out, we're done, drop the RCU read lock and return.
> 9. increment vma refcount
> 10. drop RCU read lock
> 11. call ->fault
> 12. decrement vma refcount

Note that most of your proposed steps seem similar in principle to mine.
Looking at the fast path (steps 1-8):
- step 2 sounds like the speculative part of __handle_mm_fault()
- (step 3 not included in my proposal)
- step 4 is basically the lookup I currently have in the arch fault handler
- step 6 sounds like the speculative part of map_pte_lock()

I have working implementations for each step, while your proposal
summarizes each as a point item. It's not clear to me what to make of it;
presumably you would be "filling in the blanks" in a different way
than I have but you are not explaining how. Are you suggesting that
the precautions taken in each step to avoid races with mmap writers
would not be necessary in your proposal ? if that is the case, what is
the alternative mechanism would you use to handle such races ?

Going back to the source of this, you suggested not copying the VMA,
what is your proposed alternative ? Do you suggest that fault handlers
should deal with the vma potentially mutating under them ? Or should
mmap writers consider vmas as immutable and copy them whenever they
want to change them ? or are you implying a locking mechanism that would
prevent mmap writers from executing while the fault is running ?

> Compared to today, where we bump the refcount on the file underlying the
> vma, this is _better_ scalability -- different mappings of the same file
> will not contend on the file's refcount.
> 
> I suspect your huge VMA was anon, and that wouldn't need a vma refcount
> as faulting in new pages doesn't need to do I/O, just drop the RCU
> lock, allocate and retry.

Re: [RFC PATCH 24/37] mm: implement speculative handling in __do_fault()

[Matthew Wilcox]

On Thu, Apr 08, 2021 at 01:37:34AM -0700, Michel Lespinasse wrote:
> On Thu, Apr 08, 2021 at 08:13:43AM +0100, Matthew Wilcox wrote:
> > On Thu, Apr 08, 2021 at 09:00:26AM +0200, Peter Zijlstra wrote:
> > > On Wed, Apr 07, 2021 at 10:27:12PM +0100, Matthew Wilcox wrote:
> > > > Doing I/O without any lock held already works; it just uses the file
> > > > refcount.  It would be better to use a vma refcount, as I already said.
> > > 
> > > The original workload that I developed SPF for (waaaay back when) was
> > > prefaulting a single huge vma. Using a vma refcount was a total loss
> > > because it resulted in the same cacheline contention that down_read()
> > > was having.
> > > 
> > > As such, I'm always incredibly sad to see mention of vma refcounts.
> > > They're fundamentally not solving the problem :/
> > 
> > OK, let me outline my locking scheme because I think it's rather better
> > than Michel's.  The vma refcount is the slow path.
> > 
> > 1. take the RCU read lock
> > 2. walk the pgd/p4d/pud/pmd
> > 3. allocate page tables if necessary.  *handwave GFP flags*.
> > 4. walk the vma tree
> > 5. call ->map_pages
> > 6. take ptlock
> > 7. insert page(s)
> > 8. drop ptlock
> > if this all worked out, we're done, drop the RCU read lock and return.
> > 9. increment vma refcount
> > 10. drop RCU read lock
> > 11. call ->fault
> > 12. decrement vma refcount
> 
> Note that most of your proposed steps seem similar in principle to mine.
> Looking at the fast path (steps 1-8):
> - step 2 sounds like the speculative part of __handle_mm_fault()
> - (step 3 not included in my proposal)
> - step 4 is basically the lookup I currently have in the arch fault handler
> - step 6 sounds like the speculative part of map_pte_lock()
> 
> I have working implementations for each step, while your proposal
> summarizes each as a point item. It's not clear to me what to make of it;
> presumably you would be "filling in the blanks" in a different way
> than I have but you are not explaining how. Are you suggesting that
> the precautions taken in each step to avoid races with mmap writers
> would not be necessary in your proposal ? if that is the case, what is
> the alternative mechanism would you use to handle such races ?

I don't know if you noticed, I've been a little busy with memory folios.
I did tell you that on the call, but you don't seem to retain anything
I tell you on the call, so maybe I shouldn't bother calling in any more.

> Going back to the source of this, you suggested not copying the VMA,
> what is your proposed alternative ? Do you suggest that fault handlers
> should deal with the vma potentially mutating under them ? Or should
> mmap writers consider vmas as immutable and copy them whenever they
> want to change them ? or are you implying a locking mechanism that would
> prevent mmap writers from executing while the fault is running ?

The VMA should be immutable, as I explained to you before.

[RFC PATCH 25/37] mm: implement speculative handling in filemap_fault()

[Michel Lespinasse]

Extend filemap_fault() to handle speculative faults.

In the speculative case, we will only be fishing existing pages out of
the page cache. The logic we use mirrors what is done in the
non-speculative case, assuming that pages are found in the page cache,
are up to date and not already locked, and that readahead is not
necessary at this time. In all other cases, the fault is aborted to be
handled non-speculatively.

Signed-off-by: Michel Lespinasse <michel@lespinasse.org>
---
 mm/filemap.c | 45 ++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 44 insertions(+), 1 deletion(-)

diff --git a/mm/filemap.c b/mm/filemap.c
index 43700480d897..6e8505fe5df9 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -2851,7 +2851,9 @@ static struct file *do_async_mmap_readahead(struct vm_fault *vmf,
  * it in the page cache, and handles the special cases reasonably without
  * having a lot of duplicated code.
  *
- * vma->vm_mm->mmap_lock must be held on entry.
+ * If FAULT_FLAG_SPECULATIVE is set, this function runs within an rcu
+ * read locked section and with mmap lock not held.
+ * Otherwise, vma->vm_mm->mmap_lock must be held on entry.
  *
  * If our return value has VM_FAULT_RETRY set, it's because the mmap_lock
  * may be dropped before doing I/O or by lock_page_maybe_drop_mmap().
@@ -2876,6 +2878,47 @@ vm_fault_t filemap_fault(struct vm_fault *vmf)
 	struct page *page;
 	vm_fault_t ret = 0;
 
+	if (vmf->flags & FAULT_FLAG_SPECULATIVE) {
+		page = find_get_page(mapping, offset);
+		if (unlikely(!page) || unlikely(PageReadahead(page)))
+			return VM_FAULT_RETRY;
+
+		if (!trylock_page(page))
+			return VM_FAULT_RETRY;
+
+		if (unlikely(compound_head(page)->mapping != mapping))
+			goto page_unlock;
+		VM_BUG_ON_PAGE(page_to_pgoff(page) != offset, page);
+		if (unlikely(!PageUptodate(page)))
+			goto page_unlock;
+
+		max_off = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);
+		if (unlikely(offset >= max_off))
+			goto page_unlock;
+
+		/*
+		 * Update readahead mmap_miss statistic.
+		 *
+		 * Note that we are not sure if finish_fault() will
+		 * manage to complete the transaction. If it fails,
+		 * we'll come back to filemap_fault() non-speculative
+		 * case which will update mmap_miss a second time.
+		 * This is not ideal, we would prefer to guarantee the
+		 * update will happen exactly once.
+		 */
+		if (!(vmf->vma->vm_flags & VM_RAND_READ) && ra->ra_pages) {
+			unsigned int mmap_miss = READ_ONCE(ra->mmap_miss);
+			if (mmap_miss)
+				WRITE_ONCE(ra->mmap_miss, --mmap_miss);
+		}
+
+		vmf->page = page;
+		return VM_FAULT_LOCKED;
+page_unlock:
+		unlock_page(page);
+		return VM_FAULT_RETRY;
+	}
+
 	max_off = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);
 	if (unlikely(offset >= max_off))
 		return VM_FAULT_SIGBUS;
-- 
2.20.1

[RFC PATCH 26/37] mm: implement speculative fault handling in finish_fault()

[Michel Lespinasse]

In the speculative case, we want to avoid direct pmd checks (which
would require some extra synchronization to be safe), and rely on
pte_map_lock which will both lock the page table and verify that the
pmd has not changed from its initial value.

Signed-off-by: Michel Lespinasse <michel@lespinasse.org>
---
 mm/memory.c | 28 +++++++++++++++-------------
 1 file changed, 15 insertions(+), 13 deletions(-)

diff --git a/mm/memory.c b/mm/memory.c
index 7139004c624d..13e2aaf900e5 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -3915,23 +3915,25 @@ vm_fault_t finish_fault(struct vm_fault *vmf)
 			return ret;
 	}
 
-	if (pmd_none(*vmf->pmd)) {
-		if (PageTransCompound(page)) {
-			ret = do_set_pmd(vmf, page);
-			if (ret != VM_FAULT_FALLBACK)
-				return ret;
+	if (!(vmf->flags & FAULT_FLAG_SPECULATIVE)) {
+		if (pmd_none(*vmf->pmd)) {
+			if (PageTransCompound(page)) {
+				ret = do_set_pmd(vmf, page);
+				if (ret != VM_FAULT_FALLBACK)
+					return ret;
+			}
+
+			if (unlikely(pte_alloc(vma->vm_mm, vmf->pmd)))
+				return VM_FAULT_OOM;
 		}
 
-		if (unlikely(pte_alloc(vma->vm_mm, vmf->pmd)))
-			return VM_FAULT_OOM;
+		/* See comment in __handle_mm_fault() */
+		if (pmd_devmap_trans_unstable(vmf->pmd))
+			return 0;
 	}
 
-	/* See comment in __handle_mm_fault() */
-	if (pmd_devmap_trans_unstable(vmf->pmd))
-		return 0;
-
-	vmf->pte = pte_offset_map_lock(vma->vm_mm, vmf->pmd,
-				      vmf->address, &vmf->ptl);
+	if (!pte_map_lock(vmf))
+		return VM_FAULT_RETRY;
 	ret = 0;
 	/* Re-check under ptl */
 	if (likely(pte_none(*vmf->pte)))
-- 
2.20.1

[RFC PATCH 27/37] mm: implement speculative handling in do_fault_around()

[Michel Lespinasse]

Call the vm_ops->map_pages method within an rcu read locked section.
In the speculative case, verify the mmap sequence lock at the start of
the section. A match guarantees that the original vma is still valid
at that time, and that the associated vma->vm_file stays valid while
the vm_ops->map_pages() method is running.

Do not test vmf->pmd in the speculative case - we only speculate when
a page table already exists, and and this saves us from having to handle
synchronization around the vmf->pmd read.

Change xfs_filemap_map_pages() account for the fact that it can not
block anymore, as it is now running within an rcu read lock.

Signed-off-by: Michel Lespinasse <michel@lespinasse.org>
---
 fs/xfs/xfs_file.c |  3 +++
 mm/memory.c       | 22 ++++++++++++++++++++--
 2 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index a007ca0711d9..b360732b20ae 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -1387,6 +1387,9 @@ xfs_filemap_map_pages(
 	struct inode		*inode = file_inode(vmf->vma->vm_file);
 	vm_fault_t ret;
 
+	if (!xfs_ilock_nowait(XFS_I(inode), XFS_MMAPLOCK_SHARED))
+		return (vmf->flags & FAULT_FLAG_SPECULATIVE) ?
+			VM_FAULT_RETRY : 0;
 	xfs_ilock(XFS_I(inode), XFS_MMAPLOCK_SHARED);
 	ret = filemap_map_pages(vmf, start_pgoff, end_pgoff);
 	xfs_iunlock(XFS_I(inode), XFS_MMAPLOCK_SHARED);
diff --git a/mm/memory.c b/mm/memory.c
index 13e2aaf900e5..a20e13d84145 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -4012,6 +4012,7 @@ static vm_fault_t do_fault_around(struct vm_fault *vmf)
 	pgoff_t start_pgoff = vmf->pgoff;
 	pgoff_t end_pgoff;
 	int off;
+	vm_fault_t ret;
 
 	nr_pages = READ_ONCE(fault_around_bytes) >> PAGE_SHIFT;
 	mask = ~(nr_pages * PAGE_SIZE - 1) & PAGE_MASK;
@@ -4030,14 +4031,31 @@ static vm_fault_t do_fault_around(struct vm_fault *vmf)
 	end_pgoff = min3(end_pgoff, vma_pages(vmf->vma) + vmf->vma->vm_pgoff - 1,
 			start_pgoff + nr_pages - 1);
 
-	if (pmd_none(*vmf->pmd)) {
+	if (!(vmf->flags & FAULT_FLAG_SPECULATIVE) &&
+	    pmd_none(*vmf->pmd)) {
 		vmf->prealloc_pte = pte_alloc_one(vmf->vma->vm_mm);
 		if (!vmf->prealloc_pte)
 			return VM_FAULT_OOM;
 		smp_wmb(); /* See comment in __pte_alloc() */
 	}
 
-	return vmf->vma->vm_ops->map_pages(vmf, start_pgoff, end_pgoff);
+	rcu_read_lock();
+#ifdef CONFIG_SPECULATIVE_PAGE_FAULT
+	if (vmf->flags & FAULT_FLAG_SPECULATIVE) {
+		if (!mmap_seq_read_check(vmf->vma->vm_mm, vmf->seq)) {
+			rcu_read_unlock();
+			return VM_FAULT_RETRY;
+		}
+		/*
+		 * the mmap sequence check verified that vmf->vma was still
+		 * current at that point in time.
+		 * The rcu read lock ensures vmf->vma->vm_file stays valid.
+		 */
+	}
+#endif
+	ret = vmf->vma->vm_ops->map_pages(vmf, start_pgoff, end_pgoff);
+	rcu_read_unlock();
+	return ret;
 }
 
 static vm_fault_t do_read_fault(struct vm_fault *vmf)
-- 
2.20.1

Re: [RFC PATCH 27/37] mm: implement speculative handling in do_fault_around()

[Matthew Wilcox]

On Tue, Apr 06, 2021 at 06:44:52PM -0700, Michel Lespinasse wrote:
> Change xfs_filemap_map_pages() account for the fact that it can not
> block anymore, as it is now running within an rcu read lock.

Better to just delete xfs_filemap_map_pages() and use filemap_map_pages
directly.

[RFC PATCH 28/37] mm: implement speculative handling in filemap_map_pages()

[Michel Lespinasse]

In the speculative case, we know the page table already exists, and it
must be locked with pte_map_lock(). In the case where no page is found
for the given address, return VM_FAULT_RETRY which will abort the
fault before we get into the vm_ops->fault() callback. This is fine
because if filemap_map_pages does not find the page in page cache,
vm_ops->fault() will not either.

Initialize addr and last_pgoff to correspond to the pte at the original
fault address (which was mapped with pte_map_lock()), rather than the
pte at start_pgoff. The choice of initial values doesn't matter as
they will all be adjusted together before use, so they just need to be
consistent with each other, and using the original fault address and
pte allows us to reuse pte_map_lock() without any changes to it.

Signed-off-by: Michel Lespinasse <michel@lespinasse.org>
---
 mm/filemap.c | 27 ++++++++++++++++-----------
 1 file changed, 16 insertions(+), 11 deletions(-)

diff --git a/mm/filemap.c b/mm/filemap.c
index 6e8505fe5df9..d496771749e6 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -3136,25 +3136,31 @@ vm_fault_t filemap_map_pages(struct vm_fault *vmf,
 	struct vm_area_struct *vma = vmf->vma;
 	struct file *file = vma->vm_file;
 	struct address_space *mapping = file->f_mapping;
-	pgoff_t last_pgoff = start_pgoff;
+	pgoff_t last_pgoff;
 	unsigned long addr;
 	XA_STATE(xas, &mapping->i_pages, start_pgoff);
 	struct page *head, *page;
 	unsigned int mmap_miss = READ_ONCE(file->f_ra.mmap_miss);
-	vm_fault_t ret = 0;
+	vm_fault_t ret = (vmf->flags & FAULT_FLAG_SPECULATIVE) ?
+		VM_FAULT_RETRY : 0;
 
-	rcu_read_lock();
+	/* filemap_map_pages() is called within an rcu read lock already. */
 	head = first_map_page(mapping, &xas, end_pgoff);
 	if (!head)
-		goto out;
+		return ret;
 
-	if (filemap_map_pmd(vmf, head)) {
-		ret = VM_FAULT_NOPAGE;
-		goto out;
+	if (!(vmf->flags & FAULT_FLAG_SPECULATIVE) &&
+	    filemap_map_pmd(vmf, head))
+		return VM_FAULT_NOPAGE;
+
+	if (!pte_map_lock(vmf)) {
+		unlock_page(head);
+		put_page(head);
+		return VM_FAULT_RETRY;
 	}
+	addr = vmf->address;
+	last_pgoff = vmf->pgoff;
 
-	addr = vma->vm_start + ((start_pgoff - vma->vm_pgoff) << PAGE_SHIFT);
-	vmf->pte = pte_offset_map_lock(vma->vm_mm, vmf->pmd, addr, &vmf->ptl);
 	do {
 		page = find_subpage(head, xas.xa_index);
 		if (PageHWPoison(page))
@@ -3184,8 +3190,7 @@ vm_fault_t filemap_map_pages(struct vm_fault *vmf,
 		put_page(head);
 	} while ((head = next_map_page(mapping, &xas, end_pgoff)) != NULL);
 	pte_unmap_unlock(vmf->pte, vmf->ptl);
-out:
-	rcu_read_unlock();
+	vmf->pte = NULL;
 	WRITE_ONCE(file->f_ra.mmap_miss, mmap_miss);
 	return ret;
 }
-- 
2.20.1

[RFC PATCH 29/37] fs: list file types that support speculative faults.

[Michel Lespinasse]

Add a speculative field to the vm_operations_struct, which indicates if
the associated file type supports speculative faults.

Initially this is set for files that implement fault() with filemap_fault().

Signed-off-by: Michel Lespinasse <michel@lespinasse.org>
---
 fs/btrfs/file.c    | 1 +
 fs/cifs/file.c     | 1 +
 fs/fuse/file.c     | 1 +
 fs/nfs/file.c      | 1 +
 fs/ubifs/file.c    | 1 +
 fs/vboxsf/file.c   | 1 +
 include/linux/mm.h | 7 +++++++
 mm/filemap.c       | 1 +
 8 files changed, 14 insertions(+)

diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 0e155f013839..b31851271e51 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -2293,6 +2293,7 @@ static const struct vm_operations_struct btrfs_file_vm_ops = {
 	.fault		= filemap_fault,
 	.map_pages	= filemap_map_pages,
 	.page_mkwrite	= btrfs_page_mkwrite,
+	.speculative	= true,
 };
 
 static int btrfs_file_mmap(struct file	*filp, struct vm_area_struct *vma)
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 042e24aad410..a0d5fbb25c62 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -4116,6 +4116,7 @@ static const struct vm_operations_struct cifs_file_vm_ops = {
 	.fault = filemap_fault,
 	.map_pages = filemap_map_pages,
 	.page_mkwrite = cifs_page_mkwrite,
+	.speculative = true,
 };
 
 int cifs_file_strict_mmap(struct file *file, struct vm_area_struct *vma)
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 8cccecb55fb8..c4874240d157 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -2354,6 +2354,7 @@ static const struct vm_operations_struct fuse_file_vm_ops = {
 	.fault		= filemap_fault,
 	.map_pages	= filemap_map_pages,
 	.page_mkwrite	= fuse_page_mkwrite,
+	.speculative	= true,
 };
 
 static int fuse_file_mmap(struct file *file, struct vm_area_struct *vma)
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index 16ad5050e046..e653c6bc23ca 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -588,6 +588,7 @@ static const struct vm_operations_struct nfs_file_vm_ops = {
 	.fault = filemap_fault,
 	.map_pages = filemap_map_pages,
 	.page_mkwrite = nfs_vm_page_mkwrite,
+	.speculative = true,
 };
 
 static int nfs_need_check_write(struct file *filp, struct inode *inode,
diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c
index 0e4b4be3aa26..3d97f1c3e9c7 100644
--- a/fs/ubifs/file.c
+++ b/fs/ubifs/file.c
@@ -1598,6 +1598,7 @@ static const struct vm_operations_struct ubifs_file_vm_ops = {
 	.fault        = filemap_fault,
 	.map_pages = filemap_map_pages,
 	.page_mkwrite = ubifs_vm_page_mkwrite,
+	.speculative = true,
 };
 
 static int ubifs_file_mmap(struct file *file, struct vm_area_struct *vma)
diff --git a/fs/vboxsf/file.c b/fs/vboxsf/file.c
index c4ab5996d97a..e0a6a3af9cb9 100644
--- a/fs/vboxsf/file.c
+++ b/fs/vboxsf/file.c
@@ -146,6 +146,7 @@ static const struct vm_operations_struct vboxsf_file_vm_ops = {
 	.close		= vboxsf_vma_close,
 	.fault		= filemap_fault,
 	.map_pages	= filemap_map_pages,
+	.speculative	= true,
 };
 
 static int vboxsf_file_mmap(struct file *file, struct vm_area_struct *vma)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index f26490aff514..b4c0c10e434e 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -641,6 +641,13 @@ struct vm_operations_struct {
 	 */
 	struct page *(*find_special_page)(struct vm_area_struct *vma,
 					  unsigned long addr);
+	/*
+	 * speculative indicates that the vm_operations support
+	 * speculative page faults. This allows ->fault and ->map_pages
+	 * to be called with FAULT_FLAG_SPECULATIVE set; such calls will
+	 * run within an rcu read locked section and with mmap lock not held.
+	 */
+	bool speculative;
 };
 
 static inline void vma_init(struct vm_area_struct *vma, struct mm_struct *mm)
diff --git a/mm/filemap.c b/mm/filemap.c
index d496771749e6..b83040c672d3 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -3226,6 +3226,7 @@ const struct vm_operations_struct generic_file_vm_ops = {
 	.fault		= filemap_fault,
 	.map_pages	= filemap_map_pages,
 	.page_mkwrite	= filemap_page_mkwrite,
+	.speculative	= true,
 };
 
 /* This is used for a general mmap of a disk file */
-- 
2.20.1

Re: [RFC PATCH 29/37] fs: list file types that support speculative faults.

[Matthew Wilcox]

On Tue, Apr 06, 2021 at 06:44:54PM -0700, Michel Lespinasse wrote:
> Add a speculative field to the vm_operations_struct, which indicates if
> the associated file type supports speculative faults.
> 
> Initially this is set for files that implement fault() with filemap_fault().

Ugh, no.  This goes away if you don't call ->fault speculatively.

[RFC PATCH 30/37] mm: enable speculative fault handling for supported file types.

[Michel Lespinasse]

Introduce vma_can_speculate(), which allows speculative handling for
VMAs mapping supported file types.

From do_handle_mm_fault(), speculative handling will follow through
__handle_mm_fault(), handle_pte_fault() and do_fault().

At this point, we expect speculative faults to continue through one of:
- do_read_fault(), fully implemented;
- do_cow_fault(), which might abort if missing anon vmas,
- do_shared_fault(), not implemented yet
  (would require ->page_mkwrite() changes).

vma_can_speculate() provides an early abort for the do_shared_fault() case,
limiting the time spent on trying that unimplemented case.

Signed-off-by: Michel Lespinasse <michel@lespinasse.org>
---
 arch/x86/mm/fault.c |  3 ++-
 include/linux/mm.h  | 14 ++++++++++++++
 mm/memory.c         | 17 ++++++++++++-----
 3 files changed, 28 insertions(+), 6 deletions(-)

diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index fbf265f56a06..48b86911a6df 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -1324,7 +1324,8 @@ void do_user_addr_fault(struct pt_regs *regs,
 		goto spf_abort;
 	rcu_read_lock();
 	vma = find_vma(mm, address);
-	if (!vma || vma->vm_start > address || !vma_is_anonymous(vma)) {
+	if (!vma || vma->vm_start > address ||
+	    !vma_can_speculate(vma, flags)) {
 		rcu_read_unlock();
 		goto spf_abort;
 	}
diff --git a/include/linux/mm.h b/include/linux/mm.h
index b4c0c10e434e..edb809e9036b 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -700,6 +700,20 @@ static inline bool vma_is_accessible(struct vm_area_struct *vma)
 	return vma->vm_flags & VM_ACCESS_FLAGS;
 }
 
+static inline bool vma_can_speculate(struct vm_area_struct *vma,
+		unsigned int flags)
+{
+	if (vma_is_anonymous(vma))
+		return true;
+	if (!vma->vm_ops->speculative)
+		return false;
+	if (!(flags & FAULT_FLAG_WRITE))
+		return true;
+	if (!(vma->vm_flags & VM_SHARED))
+		return true;
+	return false;
+}
+
 #ifdef CONFIG_SHMEM
 /*
  * The vma_is_shmem is not inline because it is used only by slow
diff --git a/mm/memory.c b/mm/memory.c
index a20e13d84145..074945faf1ab 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -4090,8 +4090,12 @@ static vm_fault_t do_cow_fault(struct vm_fault *vmf)
 	struct vm_area_struct *vma = vmf->vma;
 	vm_fault_t ret;
 
-	if (unlikely(anon_vma_prepare(vma)))
-		return VM_FAULT_OOM;
+	if (unlikely(!vma->anon_vma)) {
+		if (vmf->flags & FAULT_FLAG_SPECULATIVE)
+			return VM_FAULT_RETRY;
+		if (__anon_vma_prepare(vma))
+			return VM_FAULT_OOM;
+	}
 
 	vmf->cow_page = alloc_page_vma(GFP_HIGHUSER_MOVABLE, vma, vmf->address);
 	if (!vmf->cow_page)
@@ -4128,6 +4132,8 @@ static vm_fault_t do_shared_fault(struct vm_fault *vmf)
 	struct vm_area_struct *vma = vmf->vma;
 	vm_fault_t ret, tmp;
 
+	VM_BUG_ON(vmf->flags & FAULT_FLAG_SPECULATIVE);
+
 	ret = __do_fault(vmf);
 	if (unlikely(ret & (VM_FAULT_ERROR | VM_FAULT_NOPAGE | VM_FAULT_RETRY)))
 		return ret;
@@ -4172,12 +4178,12 @@ static vm_fault_t do_fault(struct vm_fault *vmf)
 	struct mm_struct *vm_mm = vma->vm_mm;
 	vm_fault_t ret;
 
-	VM_BUG_ON(vmf->flags & FAULT_FLAG_SPECULATIVE);
-
 	/*
 	 * The VMA was not fully populated on mmap() or missing VM_DONTEXPAND
 	 */
 	if (!vma->vm_ops->fault) {
+		VM_BUG_ON(vmf->flags & FAULT_FLAG_SPECULATIVE);
+
 		/*
 		 * If we find a migration pmd entry or a none pmd entry, which
 		 * should never happen, return SIGBUS
@@ -4739,7 +4745,8 @@ vm_fault_t do_handle_mm_fault(struct vm_area_struct *vma,
 {
 	vm_fault_t ret;
 
-	VM_BUG_ON((flags & FAULT_FLAG_SPECULATIVE) && !vma_is_anonymous(vma));
+	VM_BUG_ON((flags & FAULT_FLAG_SPECULATIVE) &&
+		  !vma_can_speculate(vma, flags));
 
 	__set_current_state(TASK_RUNNING);
 
-- 
2.20.1

[RFC PATCH 31/37] ext4: implement speculative fault handling

[Michel Lespinasse]

We just need to make sure ext4_filemap_fault() doesn't block in the
speculative case as it is called with an rcu read lock held.

Signed-off-by: Michel Lespinasse <michel@lespinasse.org>
---
 fs/ext4/file.c  | 1 +
 fs/ext4/inode.c | 7 ++++++-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 194f5d00fa32..546b9d4aa9d7 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -742,6 +742,7 @@ static const struct vm_operations_struct ext4_file_vm_ops = {
 	.fault		= ext4_filemap_fault,
 	.map_pages	= filemap_map_pages,
 	.page_mkwrite   = ext4_page_mkwrite,
+	.speculative	= true,
 };
 
 static int ext4_file_mmap(struct file *file, struct vm_area_struct *vma)
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 0948a43f1b3d..370484403c71 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -6192,7 +6192,12 @@ vm_fault_t ext4_filemap_fault(struct vm_fault *vmf)
 	struct inode *inode = file_inode(vmf->vma->vm_file);
 	vm_fault_t ret;
 
-	down_read(&EXT4_I(inode)->i_mmap_sem);
+	if (vmf->flags & FAULT_FLAG_SPECULATIVE) {
+		if (!down_read_trylock(&EXT4_I(inode)->i_mmap_sem))
+			return VM_FAULT_RETRY;
+	} else {
+		down_read(&EXT4_I(inode)->i_mmap_sem);
+	}
 	ret = filemap_fault(vmf);
 	up_read(&EXT4_I(inode)->i_mmap_sem);
 
-- 
2.20.1

[RFC PATCH 32/37] f2fs: implement speculative fault handling

[Michel Lespinasse]

We just need to make sure f2fs_filemap_fault() doesn't block in the
speculative case as it is called with an rcu read lock held.

Signed-off-by: Michel Lespinasse <michel@lespinasse.org>
---
 fs/f2fs/file.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index d26ff2ae3f5e..c1cfdc3ec98e 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -37,7 +37,12 @@ static vm_fault_t f2fs_filemap_fault(struct vm_fault *vmf)
 	struct inode *inode = file_inode(vmf->vma->vm_file);
 	vm_fault_t ret;
 
-	down_read(&F2FS_I(inode)->i_mmap_sem);
+	if (vmf->flags & FAULT_FLAG_SPECULATIVE) {
+		if (!down_read_trylock(&F2FS_I(inode)->i_mmap_sem))
+			return VM_FAULT_RETRY;
+	} else {
+		down_read(&F2FS_I(inode)->i_mmap_sem);
+	}
 	ret = filemap_fault(vmf);
 	up_read(&F2FS_I(inode)->i_mmap_sem);
 
@@ -171,6 +176,7 @@ static const struct vm_operations_struct f2fs_file_vm_ops = {
 	.fault		= f2fs_filemap_fault,
 	.map_pages	= filemap_map_pages,
 	.page_mkwrite	= f2fs_vm_page_mkwrite,
+	.speculative	= true,
 };
 
 static int get_parent_ino(struct inode *inode, nid_t *pino)
-- 
2.20.1

[RFC PATCH 33/37] mm: enable speculative fault handling only for multithreaded user space

[Michel Lespinasse]

Performance tuning: single threaded userspace does not benefit from
speculative page faults, so we turn them off to avoid any related
(small) extra overheads.

Signed-off-by: Michel Lespinasse <michel@lespinasse.org>
---
 arch/x86/mm/fault.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index 48b86911a6df..b1a07ca82d59 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -1318,6 +1318,10 @@ void do_user_addr_fault(struct pt_regs *regs,
 	}
 #endif
 
+	/* Only try spf for multithreaded user space faults. */
+	if (!(flags & FAULT_FLAG_USER) || atomic_read(&mm->mm_users) == 1)
+		goto no_spf;
+
 	count_vm_event(SPF_ATTEMPT);
 	seq = mmap_seq_read_start(mm);
 	if (seq & 1)
@@ -1351,6 +1355,7 @@ void do_user_addr_fault(struct pt_regs *regs,
 
 spf_abort:
 	count_vm_event(SPF_ABORT);
+no_spf:
 
 	/*
 	 * Kernel-mode access to the user address space should only occur
-- 
2.20.1

Re: [RFC PATCH 33/37] mm: enable speculative fault handling only for multithreaded user space

[Matthew Wilcox]

On Tue, Apr 06, 2021 at 06:44:58PM -0700, Michel Lespinasse wrote:
> +	/* Only try spf for multithreaded user space faults. */

This comment is misleading ... mm_users will also be incremented for
ptraced programs as well as programs that are having their /proc/$pid/maps
examined, etc.  Maybe:

	/* No need to try spf for single-threaded programs */

Also, please, can we not use an acronym for this feature?  It's not a
speculative page fault.  The page fault is really happening.  We're
trying to handle it under RCU protection (if anything the faultaround
code is the speculative page fault code ...)  This is unlocked page
fault handling, perhaps?

> +	if (!(flags & FAULT_FLAG_USER) || atomic_read(&mm->mm_users) == 1)
> +		goto no_spf;
> +
>  	count_vm_event(SPF_ATTEMPT);
>  	seq = mmap_seq_read_start(mm);
>  	if (seq & 1)
> @@ -1351,6 +1355,7 @@ void do_user_addr_fault(struct pt_regs *regs,
>  
>  spf_abort:
>  	count_vm_event(SPF_ABORT);
> +no_spf:
>  
>  	/*
>  	 * Kernel-mode access to the user address space should only occur
> -- 
> 2.20.1
> 
> 

[RFC PATCH 34/37] mm: rcu safe vma freeing only for multithreaded user space

[Michel Lespinasse]

Performance tuning: as single threaded userspace does not use
speculative page faults, it does not require rcu safe vma freeing.
Turn this off to avoid the related (small) extra overheads.

For multi threaded userspace, we often see a performance benefit from
the rcu safe vma freeing - even in tests that do not have any frequent
concurrent page faults ! This is because rcu safe vma freeing prevents
recently released vmas from being immediately reused in a new thread.

Signed-off-by: Michel Lespinasse <michel@lespinasse.org>
---
 kernel/fork.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/kernel/fork.c b/kernel/fork.c
index 2f20a5c5fed8..623875e8e742 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -389,10 +389,12 @@ static void __vm_area_free(struct rcu_head *head)
 void vm_area_free(struct vm_area_struct *vma)
 {
 #ifdef CONFIG_SPECULATIVE_PAGE_FAULT
-	call_rcu(&vma->vm_rcu, __vm_area_free);
-#else
-	____vm_area_free(vma);
+	if (atomic_read(&vma->vm_mm->mm_users) > 1) {
+		call_rcu(&vma->vm_rcu, __vm_area_free);
+		return;
+	}
 #endif
+	____vm_area_free(vma);
 }
 
 static void account_kernel_stack(struct task_struct *tsk, int account)
-- 
2.20.1

Re: [RFC PATCH 34/37] mm: rcu safe vma freeing only for multithreaded user space

[Matthew Wilcox]

On Tue, Apr 06, 2021 at 06:44:59PM -0700, Michel Lespinasse wrote:
> Performance tuning: as single threaded userspace does not use
> speculative page faults, it does not require rcu safe vma freeing.
> Turn this off to avoid the related (small) extra overheads.
> 
> For multi threaded userspace, we often see a performance benefit from
> the rcu safe vma freeing - even in tests that do not have any frequent
> concurrent page faults ! This is because rcu safe vma freeing prevents
> recently released vmas from being immediately reused in a new thread.

Why does that provide a performance benefit?  Recently released
VMAs are cache-hot, and NUMA-local.  I'd expect the RCU delay to be
performance-negative.

Re: [RFC PATCH 34/37] mm: rcu safe vma freeing only for multithreaded user space

[Michel Lespinasse]

On Wed, Apr 07, 2021 at 03:50:06AM +0100, Matthew Wilcox wrote:
> On Tue, Apr 06, 2021 at 06:44:59PM -0700, Michel Lespinasse wrote:
> > Performance tuning: as single threaded userspace does not use
> > speculative page faults, it does not require rcu safe vma freeing.
> > Turn this off to avoid the related (small) extra overheads.
> > 
> > For multi threaded userspace, we often see a performance benefit from
> > the rcu safe vma freeing - even in tests that do not have any frequent
> > concurrent page faults ! This is because rcu safe vma freeing prevents
> > recently released vmas from being immediately reused in a new thread.
> 
> Why does that provide a performance benefit?  Recently released
> VMAs are cache-hot, and NUMA-local.  I'd expect the RCU delay to be
> performance-negative.

I only have the observation and no full explanation for it.
Just try it on wis-mmap and wis-malloc threaded cases. Of course this
all washes away when dealing with more realistic macro benchmarks.

[RFC PATCH 35/37] mm: spf statistics

[Michel Lespinasse]

Add a new CONFIG_SPECULATIVE_PAGE_FAULT_STATS config option,
and dump extra statistics about executed spf cases and abort reasons
when the option is set.

Signed-off-by: Michel Lespinasse <michel@lespinasse.org>
---
 arch/x86/mm/fault.c           | 19 +++++++---
 include/linux/mmap_lock.h     | 19 +++++++++-
 include/linux/vm_event_item.h | 24 ++++++++++++
 include/linux/vmstat.h        |  6 +++
 mm/Kconfig.debug              |  7 ++++
 mm/memory.c                   | 71 ++++++++++++++++++++++++++++-------
 mm/vmstat.c                   | 24 ++++++++++++
 7 files changed, 149 insertions(+), 21 deletions(-)

diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index b1a07ca82d59..e210bbcb8bc5 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -1324,22 +1324,31 @@ void do_user_addr_fault(struct pt_regs *regs,
 
 	count_vm_event(SPF_ATTEMPT);
 	seq = mmap_seq_read_start(mm);
-	if (seq & 1)
+	if (seq & 1) {
+		count_vm_spf_event(SPF_ABORT_ODD);
 		goto spf_abort;
+	}
 	rcu_read_lock();
 	vma = find_vma(mm, address);
-	if (!vma || vma->vm_start > address ||
-	    !vma_can_speculate(vma, flags)) {
+	if (!vma || vma->vm_start > address) {
 		rcu_read_unlock();
+		count_vm_spf_event(SPF_ABORT_UNMAPPED);
+		goto spf_abort;
+	}
+	if (!vma_can_speculate(vma, flags)) {
+		rcu_read_unlock();
+		count_vm_spf_event(SPF_ABORT_NO_SPECULATE);
 		goto spf_abort;
 	}
 	pvma = *vma;
 	rcu_read_unlock();
-	if (!mmap_seq_read_check(mm, seq))
+	if (!mmap_seq_read_check(mm, seq, SPF_ABORT_VMA_COPY))
 		goto spf_abort;
 	vma = &pvma;
-	if (unlikely(access_error(error_code, vma)))
+	if (unlikely(access_error(error_code, vma))) {
+		count_vm_spf_event(SPF_ABORT_ACCESS_ERROR);
 		goto spf_abort;
+	}
 	fault = do_handle_mm_fault(vma, address,
 				   flags | FAULT_FLAG_SPECULATIVE, seq, regs);
 
diff --git a/include/linux/mmap_lock.h b/include/linux/mmap_lock.h
index 8f4eca2d0f43..98f24a9910a9 100644
--- a/include/linux/mmap_lock.h
+++ b/include/linux/mmap_lock.h
@@ -7,6 +7,7 @@
 #include <linux/rwsem.h>
 #include <linux/tracepoint-defs.h>
 #include <linux/types.h>
+#include <linux/vmstat.h>
 
 #ifdef CONFIG_SPECULATIVE_PAGE_FAULT
 #define MMAP_LOCK_SEQ_INITIALIZER(name) \
@@ -104,12 +105,26 @@ static inline unsigned long mmap_seq_read_start(struct mm_struct *mm)
 	return seq;
 }
 
-static inline bool mmap_seq_read_check(struct mm_struct *mm, unsigned long seq)
+static inline bool __mmap_seq_read_check(struct mm_struct *mm,
+					 unsigned long seq)
 {
 	smp_rmb();
 	return seq == READ_ONCE(mm->mmap_seq);
 }
-#endif
+
+#ifdef CONFIG_SPECULATIVE_PAGE_FAULT_STATS
+static inline bool mmap_seq_read_check(struct mm_struct *mm, unsigned long seq,
+	enum vm_event_item fail_event)
+{
+	if (__mmap_seq_read_check(mm, seq))
+		return true;
+	count_vm_event(fail_event);
+	return false;
+}
+#else
+#define mmap_seq_read_check(mm, seq, fail) __mmap_seq_read_check(mm, seq)
+#endif /* CONFIG_SPECULATIVE_PAGE_FAULT_STATS */
+#endif /* CONFIG_SPECULATIVE_PAGE_FAULT */
 
 static inline void mmap_write_lock(struct mm_struct *mm)
 {
diff --git a/include/linux/vm_event_item.h b/include/linux/vm_event_item.h
index cc4f8d14e43f..6d25fd9ce4d1 100644
--- a/include/linux/vm_event_item.h
+++ b/include/linux/vm_event_item.h
@@ -124,6 +124,30 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT,
 #ifdef CONFIG_SPECULATIVE_PAGE_FAULT
 		SPF_ATTEMPT,
 		SPF_ABORT,
+#endif
+#ifdef CONFIG_SPECULATIVE_PAGE_FAULT_STATS
+		SPF_ABORT_ODD,
+		SPF_ABORT_UNMAPPED,
+		SPF_ABORT_NO_SPECULATE,
+		SPF_ABORT_VMA_COPY,
+		SPF_ABORT_ACCESS_ERROR,
+		SPF_ABORT_PUD,
+		SPF_ABORT_PMD,
+		SPF_ABORT_ANON_VMA,
+		SPF_ABORT_PTE_MAP_LOCK_SEQ1,
+		SPF_ABORT_PTE_MAP_LOCK_PMD,
+		SPF_ABORT_PTE_MAP_LOCK_PTL,
+		SPF_ABORT_PTE_MAP_LOCK_SEQ2,
+		SPF_ABORT_USERFAULTFD,
+		SPF_ABORT_FAULT,
+		SPF_ABORT_NON_SWAP_ENTRY,
+		SPF_ABORT_SWAP_NOPAGE,
+		SPF_ATTEMPT_ANON,
+		SPF_ATTEMPT_FILE,
+		SPF_ATTEMPT_SWAP,
+		SPF_ATTEMPT_NUMA,
+		SPF_ATTEMPT_PTE,
+		SPF_ATTEMPT_WP,
 #endif
 		NR_VM_EVENT_ITEMS
 };
diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h
index 506d625163a1..34e05604a93f 100644
--- a/include/linux/vmstat.h
+++ b/include/linux/vmstat.h
@@ -109,6 +109,12 @@ static inline void vm_events_fold_cpu(int cpu)
 
 #endif /* CONFIG_VM_EVENT_COUNTERS */
 
+#ifdef CONFIG_SPECULATIVE_PAGE_FAULT_STATS
+#define count_vm_spf_event(x) count_vm_event(x)
+#else
+#define count_vm_spf_event(x) do {} while (0)
+#endif
+
 #ifdef CONFIG_NUMA_BALANCING
 #define count_vm_numa_event(x)     count_vm_event(x)
 #define count_vm_numa_events(x, y) count_vm_events(x, y)
diff --git a/mm/Kconfig.debug b/mm/Kconfig.debug
index 1e73717802f8..6be8ca7950ee 100644
--- a/mm/Kconfig.debug
+++ b/mm/Kconfig.debug
@@ -150,3 +150,10 @@ config PTDUMP_DEBUGFS
 	  kernel.
 
 	  If in doubt, say N.
+
+config SPECULATIVE_PAGE_FAULT_STATS
+	bool "Additional statistics for speculative page faults"
+	depends on SPECULATIVE_PAGE_FAULT
+	help
+	  Additional statistics for speculative page faults.
+	  If in doubt, say N.
diff --git a/mm/memory.c b/mm/memory.c
index 074945faf1ab..6165d340e134 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -2585,7 +2585,7 @@ bool __pte_map_lock(struct vm_fault *vmf)
 	}
 
 	local_irq_disable();
-	if (!mmap_seq_read_check(vmf->vma->vm_mm, vmf->seq))
+	if (!mmap_seq_read_check(vmf->vma->vm_mm, vmf->seq, SPF_ABORT_PTE_MAP_LOCK_SEQ1))
 		goto fail;
 	/*
 	 * The mmap sequence count check guarantees that the page
@@ -2599,8 +2599,10 @@ bool __pte_map_lock(struct vm_fault *vmf)
 	 * is not a huge collapse operation in progress in our back.
 	 */
 	pmdval = READ_ONCE(*vmf->pmd);
-	if (!pmd_same(pmdval, vmf->orig_pmd))
+	if (!pmd_same(pmdval, vmf->orig_pmd)) {
+		count_vm_spf_event(SPF_ABORT_PTE_MAP_LOCK_PMD);
 		goto fail;
+	}
 #endif
 	ptl = pte_lockptr(vmf->vma->vm_mm, vmf->pmd);
 	if (!pte)
@@ -2617,9 +2619,11 @@ bool __pte_map_lock(struct vm_fault *vmf)
 	 * We also don't want to retry until spin_trylock() succeeds,
 	 * because of the starvation potential against a stream of lockers.
 	 */
-	if (unlikely(!spin_trylock(ptl)))
+	if (unlikely(!spin_trylock(ptl))) {
+		count_vm_spf_event(SPF_ABORT_PTE_MAP_LOCK_PTL);
 		goto fail;
-	if (!mmap_seq_read_check(vmf->vma->vm_mm, vmf->seq))
+	}
+	if (!mmap_seq_read_check(vmf->vma->vm_mm, vmf->seq, SPF_ABORT_PTE_MAP_LOCK_SEQ2))
 		goto unlock_fail;
 	local_irq_enable();
 	vmf->pte = pte;
@@ -2891,6 +2895,7 @@ static vm_fault_t wp_page_copy(struct vm_fault *vmf)
 
 	if (unlikely(!vma->anon_vma)) {
 		if (vmf->flags & FAULT_FLAG_SPECULATIVE) {
+			count_vm_spf_event(SPF_ABORT_ANON_VMA);
 			ret = VM_FAULT_RETRY;
 			goto out;
 		}
@@ -3153,10 +3158,15 @@ static vm_fault_t do_wp_page(struct vm_fault *vmf)
 {
 	struct vm_area_struct *vma = vmf->vma;
 
+	if (vmf->flags & FAULT_FLAG_SPECULATIVE)
+		count_vm_spf_event(SPF_ATTEMPT_WP);
+
 	if (userfaultfd_pte_wp(vma, *vmf->pte)) {
 		pte_unmap_unlock(vmf->pte, vmf->ptl);
-		if (vmf->flags & FAULT_FLAG_SPECULATIVE)
+		if (vmf->flags & FAULT_FLAG_SPECULATIVE) {
+			count_vm_spf_event(SPF_ABORT_USERFAULTFD);
 			return VM_FAULT_RETRY;
+		}
 		return handle_userfault(vmf, VM_UFFD_WP);
 	}
 
@@ -3340,6 +3350,9 @@ vm_fault_t do_swap_page(struct vm_fault *vmf)
 	vm_fault_t ret = 0;
 	void *shadow = NULL;
 
+	if (vmf->flags & FAULT_FLAG_SPECULATIVE)
+		count_vm_spf_event(SPF_ATTEMPT_SWAP);
+
 #if defined(CONFIG_SMP) || defined(CONFIG_PREEMPTION)
 	if (sizeof(pte_t) > sizeof(unsigned long)) {
 		/*
@@ -3366,6 +3379,7 @@ vm_fault_t do_swap_page(struct vm_fault *vmf)
 	entry = pte_to_swp_entry(vmf->orig_pte);
 	if (unlikely(non_swap_entry(entry))) {
 		if (vmf->flags & FAULT_FLAG_SPECULATIVE) {
+			count_vm_spf_event(SPF_ABORT_NON_SWAP_ENTRY);
 			ret = VM_FAULT_RETRY;
 		} else if (is_migration_entry(entry)) {
 			migration_entry_wait(vma->vm_mm, vmf->pmd,
@@ -3392,6 +3406,7 @@ vm_fault_t do_swap_page(struct vm_fault *vmf)
 
 		if (vmf->flags & FAULT_FLAG_SPECULATIVE) {
 			delayacct_clear_flag(DELAYACCT_PF_SWAPIN);
+			count_vm_spf_event(SPF_ABORT_SWAP_NOPAGE);
 			return VM_FAULT_RETRY;
 		}
 
@@ -3598,6 +3613,9 @@ static vm_fault_t do_anonymous_page(struct vm_fault *vmf)
 	vm_fault_t ret = 0;
 	pte_t entry;
 
+	if (vmf->flags & FAULT_FLAG_SPECULATIVE)
+		count_vm_spf_event(SPF_ATTEMPT_ANON);
+
 	/* File mapping without ->vm_ops ? */
 	if (vma->vm_flags & VM_SHARED)
 		return VM_FAULT_SIGBUS;
@@ -3627,8 +3645,10 @@ static vm_fault_t do_anonymous_page(struct vm_fault *vmf)
 	} else {
 		/* Allocate our own private page. */
 		if (unlikely(!vma->anon_vma)) {
-			if (vmf->flags & FAULT_FLAG_SPECULATIVE)
+			if (vmf->flags & FAULT_FLAG_SPECULATIVE) {
+				count_vm_spf_event(SPF_ABORT_ANON_VMA);
 				return VM_FAULT_RETRY;
+			}
 			if (__anon_vma_prepare(vma))
 				goto oom;
 		}
@@ -3670,8 +3690,10 @@ static vm_fault_t do_anonymous_page(struct vm_fault *vmf)
 		pte_unmap_unlock(vmf->pte, vmf->ptl);
 		if (page)
 			put_page(page);
-		if (vmf->flags & FAULT_FLAG_SPECULATIVE)
+		if (vmf->flags & FAULT_FLAG_SPECULATIVE) {
+			count_vm_spf_event(SPF_ABORT_USERFAULTFD);
 			return VM_FAULT_RETRY;
+		}
 		return handle_userfault(vmf, VM_UFFD_MISSING);
 	}
 
@@ -3712,7 +3734,8 @@ static vm_fault_t __do_fault(struct vm_fault *vmf)
 #ifdef CONFIG_SPECULATIVE_PAGE_FAULT
 	if (vmf->flags & FAULT_FLAG_SPECULATIVE) {
 		rcu_read_lock();
-		if (!mmap_seq_read_check(vmf->vma->vm_mm, vmf->seq)) {
+		if (!mmap_seq_read_check(vmf->vma->vm_mm, vmf->seq,
+					 SPF_ABORT_FAULT)) {
 			ret = VM_FAULT_RETRY;
 		} else {
 			/*
@@ -4042,7 +4065,8 @@ static vm_fault_t do_fault_around(struct vm_fault *vmf)
 	rcu_read_lock();
 #ifdef CONFIG_SPECULATIVE_PAGE_FAULT
 	if (vmf->flags & FAULT_FLAG_SPECULATIVE) {
-		if (!mmap_seq_read_check(vmf->vma->vm_mm, vmf->seq)) {
+		if (!mmap_seq_read_check(vmf->vma->vm_mm, vmf->seq,
+					 SPF_ABORT_FAULT)) {
 			rcu_read_unlock();
 			return VM_FAULT_RETRY;
 		}
@@ -4091,8 +4115,10 @@ static vm_fault_t do_cow_fault(struct vm_fault *vmf)
 	vm_fault_t ret;
 
 	if (unlikely(!vma->anon_vma)) {
-		if (vmf->flags & FAULT_FLAG_SPECULATIVE)
+		if (vmf->flags & FAULT_FLAG_SPECULATIVE) {
+			count_vm_spf_event(SPF_ABORT_ANON_VMA);
 			return VM_FAULT_RETRY;
+		}
 		if (__anon_vma_prepare(vma))
 			return VM_FAULT_OOM;
 	}
@@ -4178,6 +4204,9 @@ static vm_fault_t do_fault(struct vm_fault *vmf)
 	struct mm_struct *vm_mm = vma->vm_mm;
 	vm_fault_t ret;
 
+	if (vmf->flags & FAULT_FLAG_SPECULATIVE)
+		count_vm_spf_event(SPF_ATTEMPT_FILE);
+
 	/*
 	 * The VMA was not fully populated on mmap() or missing VM_DONTEXPAND
 	 */
@@ -4251,6 +4280,9 @@ static vm_fault_t do_numa_page(struct vm_fault *vmf)
 	bool was_writable = pte_savedwrite(vmf->orig_pte);
 	int flags = 0;
 
+	if (vmf->flags & FAULT_FLAG_SPECULATIVE)
+		count_vm_spf_event(SPF_ATTEMPT_NUMA);
+
 	/*
 	 * The "pte" at this point cannot be used safely without
 	 * validation through pte_unmap_same(). It's of NUMA type but
@@ -4423,6 +4455,9 @@ static vm_fault_t handle_pte_fault(struct vm_fault *vmf)
 	if (pte_protnone(vmf->orig_pte) && vma_is_accessible(vmf->vma))
 		return do_numa_page(vmf);
 
+	if (vmf->flags & FAULT_FLAG_SPECULATIVE)
+		count_vm_spf_event(SPF_ATTEMPT_PTE);
+
 	if (!pte_spinlock(vmf))
 		return VM_FAULT_RETRY;
 	entry = vmf->orig_pte;
@@ -4490,20 +4525,26 @@ static vm_fault_t __handle_mm_fault(struct vm_area_struct *vma,
 		local_irq_disable();
 		pgd = pgd_offset(mm, address);
 		pgdval = READ_ONCE(*pgd);
-		if (pgd_none(pgdval) || unlikely(pgd_bad(pgdval)))
+		if (pgd_none(pgdval) || unlikely(pgd_bad(pgdval))) {
+			count_vm_spf_event(SPF_ABORT_PUD);
 			goto spf_fail;
+		}
 
 		p4d = p4d_offset(pgd, address);
 		p4dval = READ_ONCE(*p4d);
-		if (p4d_none(p4dval) || unlikely(p4d_bad(p4dval)))
+		if (p4d_none(p4dval) || unlikely(p4d_bad(p4dval))) {
+			count_vm_spf_event(SPF_ABORT_PUD);
 			goto spf_fail;
+		}
 
 		vmf.pud = pud_offset(p4d, address);
 		pudval = READ_ONCE(*vmf.pud);
 		if (pud_none(pudval) || unlikely(pud_bad(pudval)) ||
 		    unlikely(pud_trans_huge(pudval)) ||
-		    unlikely(pud_devmap(pudval)))
+		    unlikely(pud_devmap(pudval))) {
+			count_vm_spf_event(SPF_ABORT_PUD);
 			goto spf_fail;
+		}
 
 		vmf.pmd = pmd_offset(vmf.pud, address);
 		vmf.orig_pmd = READ_ONCE(*vmf.pmd);
@@ -4521,8 +4562,10 @@ static vm_fault_t __handle_mm_fault(struct vm_area_struct *vma,
 		if (unlikely(pmd_none(vmf.orig_pmd) ||
 			     is_swap_pmd(vmf.orig_pmd) ||
 			     pmd_trans_huge(vmf.orig_pmd) ||
-			     pmd_devmap(vmf.orig_pmd)))
+			     pmd_devmap(vmf.orig_pmd))) {
+			count_vm_spf_event(SPF_ABORT_PMD);
 			goto spf_fail;
+		}
 
 		/*
 		 * The above does not allocate/instantiate page-tables because
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 9ae1c27a549e..ac4ff4343a49 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -1369,6 +1369,30 @@ const char * const vmstat_text[] = {
 	"spf_attempt",
 	"spf_abort",
 #endif
+#ifdef CONFIG_SPECULATIVE_PAGE_FAULT_STATS
+	"SPF_ABORT_ODD",
+	"SPF_ABORT_UNMAPPED",
+	"SPF_ABORT_NO_SPECULATE",
+	"SPF_ABORT_VMA_COPY",
+	"SPF_ABORT_ACCESS_ERROR",
+	"SPF_ABORT_PUD",
+	"SPF_ABORT_PMD",
+	"SPF_ABORT_ANON_VMA",
+	"SPF_ABORT_PTE_MAP_LOCK_SEQ1",
+	"SPF_ABORT_PTE_MAP_LOCK_PMD",
+	"SPF_ABORT_PTE_MAP_LOCK_PTL",
+	"SPF_ABORT_PTE_MAP_LOCK_SEQ2",
+	"SPF_ABORT_USERFAULTFD",
+	"SPF_ABORT_FAULT",
+	"SPF_ABORT_NON_SWAP_ENTRY",
+	"SPF_ABORT_SWAP_NOPAGE",
+	"SPF_ATTEMPT_ANON",
+	"SPF_ATTEMPT_FILE",
+	"SPF_ATTEMPT_SWAP",
+	"SPF_ATTEMPT_NUMA",
+	"SPF_ATTEMPT_PTE",
+	"SPF_ATTEMPT_WP",
+#endif
 #endif /* CONFIG_VM_EVENT_COUNTERS || CONFIG_MEMCG */
 };
 #endif /* CONFIG_PROC_FS || CONFIG_SYSFS || CONFIG_NUMA || CONFIG_MEMCG */
-- 
2.20.1

[RFC PATCH 36/37] arm64/mm: define ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT

[Michel Lespinasse]

Set ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT so that the speculative fault
handling code can be compiled on this architecture.

Signed-off-by: Michel Lespinasse <michel@lespinasse.org>
---
 arch/arm64/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index e4e1b6550115..6c2bbfe3fd38 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -208,6 +208,7 @@ config ARM64
 	select SWIOTLB
 	select SYSCTL_EXCEPTION_TRACE
 	select THREAD_INFO_IN_TASK
+	select ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT
 	help
 	  ARM 64-bit (AArch64) Linux support.
 
-- 
2.20.1

[RFC PATCH 37/37] arm64/mm: attempt speculative mm faults first

[Michel Lespinasse]

Attempt speculative mm fault handling first, and fall back to the
existing (non-speculative) code if that fails.

This follows the lines of the x86 speculative fault handling code,
but with some minor arch differences such as the way that the
VM_FAULT_BADACCESS case is handled.

Signed-off-by: Michel Lespinasse <michel@lespinasse.org>
---
 arch/arm64/mm/fault.c | 52 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)

diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c
index f37d4e3830b7..3757bfbb457a 100644
--- a/arch/arm64/mm/fault.c
+++ b/arch/arm64/mm/fault.c
@@ -25,6 +25,7 @@
 #include <linux/perf_event.h>
 #include <linux/preempt.h>
 #include <linux/hugetlb.h>
+#include <linux/vm_event_item.h>
 
 #include <asm/acpi.h>
 #include <asm/bug.h>
@@ -530,6 +531,9 @@ static int __kprobes do_page_fault(unsigned long far, unsigned int esr,
 	unsigned long vm_flags = VM_ACCESS_FLAGS;
 	unsigned int mm_flags = FAULT_FLAG_DEFAULT;
 	unsigned long addr = untagged_addr(far);
+	struct vm_area_struct *vma;
+	struct vm_area_struct pvma;
+	unsigned long seq;
 
 	if (kprobe_page_fault(regs, esr))
 		return 0;
@@ -564,6 +568,53 @@ static int __kprobes do_page_fault(unsigned long far, unsigned int esr,
 
 	perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, addr);
 
+	/* Only try spf for multithreaded user space faults. */
+	if (!(mm_flags & FAULT_FLAG_USER) || atomic_read(&mm->mm_users) == 1)
+		goto no_spf;
+
+	count_vm_event(SPF_ATTEMPT);
+	seq = mmap_seq_read_start(mm);
+	if (seq & 1) {
+		count_vm_spf_event(SPF_ABORT_ODD);
+		goto spf_abort;
+	}
+	rcu_read_lock();
+	vma = find_vma(mm, addr);
+	if (!vma || vma->vm_start > addr) {
+		rcu_read_unlock();
+		count_vm_spf_event(SPF_ABORT_UNMAPPED);
+		goto spf_abort;
+	}
+	if (!vma_can_speculate(vma, mm_flags)) {
+		rcu_read_unlock();
+		count_vm_spf_event(SPF_ABORT_NO_SPECULATE);
+		goto spf_abort;
+	}
+	pvma = *vma;
+	rcu_read_unlock();
+	if (!mmap_seq_read_check(mm, seq, SPF_ABORT_VMA_COPY))
+		goto spf_abort;
+	vma = &pvma;
+	if (!(vma->vm_flags & vm_flags)) {
+		count_vm_spf_event(SPF_ABORT_ACCESS_ERROR);
+		goto spf_abort;
+	}
+	fault = do_handle_mm_fault(vma, addr & PAGE_MASK,
+			mm_flags | FAULT_FLAG_SPECULATIVE, seq, regs);
+
+	/* Quick path to respond to signals */
+	if (fault_signal_pending(fault, regs)) {
+		if (!user_mode(regs))
+			goto no_context;
+		return 0;
+	}
+	if (!(fault & VM_FAULT_RETRY))
+		goto done;
+
+spf_abort:
+	count_vm_event(SPF_ABORT);
+no_spf:
+
 	/*
 	 * As per x86, we may deadlock here. However, since the kernel only
 	 * validly references user space from well defined areas of the code,
@@ -604,6 +655,7 @@ static int __kprobes do_page_fault(unsigned long far, unsigned int esr,
 		}
 	}
 	mmap_read_unlock(mm);
+done:
 
 	/*
 	 * Handle the "normal" (no error) case first.
-- 
2.20.1

Re: [RFC PATCH 00/37] Speculative page faults

[Chinwen Chang]

On Tue, 2021-04-06 at 18:44 -0700, Michel Lespinasse wrote:
> This patchset is my take on speculative page faults (spf).
> It builds on ideas that have been previously proposed by Laurent Dufour,
> Peter Zijlstra and others before. While Laurent's previous proposal
> was rejected around the time of LSF/MM 2019, I am hoping we can revisit
> this now based on what I think is a simpler and more bisectable approach,
> much improved scaling numbers in the anonymous vma case, and the Android
> use case that has since emerged. I will expand on these points towards
> the end of this message.
> 
> 
> Classical page fault processing takes the mmap read lock in order to
> prevent races with mmap writers. In contrast, speculative fault
> processing does not take the mmap read lock, and instead verifies,
> when the results of the page fault are about to get committed and
> become visible to other threads, that no mmap writers have been
> running concurrently with the page fault. If the check fails,
> speculative updates do not get committed and the fault is retried
> in the usual, non-speculative way (with the mmap read lock held).
> 
> The concurrency check is implemented using a per-mm mmap sequence count.
> The counter is incremented at the beginning and end of each mmap write
> operation. If the counter is initially observed to have an even value,
> and has the same value later on, the observer can deduce that no mmap
> writers have been running concurrently with it between those two times.
> This is similar to a seqlock, except that readers never spin on the
> counter value (they would instead revert to taking the mmap read lock),
> and writers are allowed to sleep. One benefit of this approach is that
> it requires no writer side changes, just some hooks in the mmap write
> lock APIs that writers already use.
> 
> The first step of a speculative page fault is to look up the vma and
> read its contents (currently by making a copy of the vma, though in
> principle it would be sufficient to only read the vma attributes that
> are used in page faults). The mmap sequence count is used to verify
> that there were no mmap writers concurrent to the lookup and copy steps.
> Note that walking rbtrees while there may potentially be concurrent
> writers is not an entirely new idea in linux, as latched rbtrees
> are already doing this. This is safe as long as the lookup is
> followed by a sequence check to verify that concurrency did not
> actually occur (and abort the speculative fault if it did).
> 
> The next step is to walk down the existing page table tree to find the
> current pte entry. This is done with interrupts disabled to avoid
> races with munmap(). Again, not an entirely new idea, as this repeats
> a pattern already present in fast GUP. Similar precautions are also
> taken when taking the page table lock.
> 
> In the case of mapped files, additional precautions must be taken when
> dereferencing vma->vm_file. The vma copy that is taken at the start of
> the speculative page fault includes a pointer to the file, but does not
> take a reference to it. The reference is held by the original vma.
> In order to guarantee the validity of the file through the vm_ops->fault()
> and/or vm_ops->map_pages() calls, these are run within an rcu read locked
> code section, with the mmap sequence count being verified at the start of
> the section and the vma file fput() is rcu-deferred when vmas are freed.
> 
> 
> The patch series applies on top of linux v5.12-rc5;
> a git tree is also available:
> git fetch https://github.com/lespinasse/linux.git v5.12-rc5-spf
> 
> 
> Commits 1 to 4 are preparatory cleanups
> (which I would like to push regardless of what happens to the rest)
> 
> Commits 5 and 6 introduce CONFIG_SPECULATIVE_PAGE_FAULT and lets us
> enable it on x86 so we can test the new code as it gets introduced.
> 
> Commits 7 and 8 extend handle_mm_fault() so it can be used for
> speculative faults; initially these always abort with VM_FAULT_RETRY.
> 
> Commits 9 to 14 introduce all the basic building blocks for speculative
> page faults:
> - Commit 9 adds the mmap sequence count that will be used for detecting
>   when writers have been running concurrently with an spf attempt
>   (in which case the attempt will be aborted);
> - Commit 10 adds RCU safe vma freeing;
> - Commit 11 does a lockless VMA lookup and starts the spf handling attempt;
> - (Commit 12 is a small refactor preparing for the next commit);
> - Commit 13 walks down the existing page tables, carefully avoiding
>   races with potential writers (munmap in particular)
> - Commit 14 introduces pte_map_lock() and pte_spinlock(), which attempt
>   to (optionally map and) lock an existing page table when it's time to
>   commit page fault results to it.
> 
> Commits 15 to 22 progressively implement spf for most anon vma cases.
> This mostly comes down to using the pte_map_lock() and pte_spinlock()
> APIs where needed, and making sure to abort speculation in unsupported
> cases (mostly anon_vma allocation and userfaultfd). The work is split
> in small steps so that changes can be tested soon after they are added.
> 
> Commits 23 to 26 introduce the main ideas for extending spf to file
> mapped vmas:
> - Commit 23 adds RCU safe vma->vm_file freeing;
> - Commit 24 uses RCU to ensure vma->vm_file stays valid through the
>   vm_ops->fault() method call;
> - Commit 25 implements the speculative case for filemap_fault().
>   This only handles the common case where the desired page is already
>   cached, is not locked and where we don't need to trigger readahead.
> - Commit 26 ensures we use pte_map_lock() to commit the faulted page to the
>   mm address space, verifying that no mmap writers ran during the fault.
> 
> Commits 27 and 28 use the same ideas to implement speculative fault-around.
> 
> Commits 29 to 32 complete spf support for most mapped file types.
> A list of supported file types is introduced, and we allow speculative
> execution through the new speculative file faulting paths for those files.
> Note that the speculative support does not extend to shared file
> mapping writes in this patchset, as this would require some support
> for vm_ops->page_mkwrite() which isn't handled yet.
> 
> Commits 33 and 34 disable speculative handling for single-threaded
> userspace. This is for (minor) performance tuning and is pushed
> towards the end of the series to make it easier to exercise the spf
> paths as they are introduced.
> 
> Commit 35 adds some extra statistics. Not pushing for inclusion on
> these but I thought it might come handy when discussing spf performance.
> 
> Commits 36 and 37 add spf support on the arm64 architecture. It should
> be easy to add other architectures too, given access to test machines.
> 
> 
> As Laurent's previous proposal before LSF/MM 2019 was rejected for
> complexity reasons, I am hoping that some of the changes I made will
> help address these concerns:
> 
> - First, the patchset is structured to be bisectable. Every few commits
>   the new code gets enabled, which makes for easier testing and also,
>   I think, should make it easier for reviewers to understand how the
>   various commits relate to each other.
> 
> - This patchset requires no changes to mmap writers other than instrumenting
>   the mmap write lock APIs.
> 
> - The fault handler operates on a stable copy of the vma, so it does not
>   require any special care to avoid the possibility of vma fields being
>   modified concurrently with it.
> 
> 
> mmtest results on HP Z840 workstation
> (2 socket Xeon E5-2690 v3 @ 2.60GHz, 24 cores / 48 threads total):
> See https://www.lespinasse.org/kernel/v5.12-rc5-spf/mmtests/
> 
> Highlights from the above:
> 
> - pft results show some pretty damn good scalability. Throughput using
>   all 48 threads (24 cores) is 24x that of single-threaded tests, and
>   3.7x higher than when using the baseline kernel. This is the result
>   of avoiding writing into any shared cache lines, be it for mmap lock
>   or vma refcounting, during speculative page faults.
>   (Experiments show that adding a single atomic variable per vma,
>   which would be incremented and decremented before and after spf
>   copies the vma, would decrease the 48-threads throughput by 62%).
> 
> - wis-pf page_fault1 (anon THP) shows some moderate improvement.
> 
> - wis-pf page_fault2 (private file mapping write) shows some
>   improvement, though much less than in the pft (anon) case.
>   The performance is limited by LRU contention here.
> 
> - wis-pf page_fault3 (shared file mapping write) gets a bit slower.
>   This patchset does not implement speculative handling for this case.
> 
> - wis-mmap likes the change, even though it doesn't do much page faults.
>   This seems to be a side effect of rcu safe vma freeing reducing vma
>   reuse between threads running on separate CPUs.
> 
> - wis-malloc benefits from a mix of the anon vma and rcu effects.
> 
> - macro benchmarks are mostly performance neutral, with some small
>   benefit in limited cases.
> 
> 
> Another potential motivation for this is the Android use case.
> Several Android vendors have picked up the previous SPF proposal and
> included it on their devices because it reduces application start-up
> times, which is an important performance metric for them.
> 
> Early Android test results with this patchset (actually a backport of
> it to the Android 5.10 kernel) show that it is also effective in
> reducing application start times, similar to what the prior SPF
> proposal did. I do not have a direct comparison available though,
> as our port of Laurent's prior SPF series to the 5.10 android kernel
> is showing some instabilities. SPF abort rates are in the low single
> digit percentage range, and few of these aborts are caused by the fact
> that we only use a global counter to detect fault vs writer concurrency.
> We are seeing launch time improvements for a variety of Android packages
> that use a large number of threads during startup:
> Meituan: 15%
> Iqiyi: 8%
> Tiktok: 4%
> YouTube: 3%
> I expect Suren may have more Android numbers from partners in a few days.
> 

Thanks for the effort:)

We have tried to merge this SPF series to our code base, and measured
the difference of application launch time. As you mentioned, it has
great improvements, especially for those high TLP ones. 

Here is a brief report of our experiment, FYR.

(The launch time is in ms)

app          version-code      w/o SPF      w/ SPF      improve(%)
------------------------------------------------------------------
Meituan      900140601         2427         1655        31.81
Taobao       241               1200         1170        2.5
WeChat       1360              941          922         2.02
Line         16071401          686          665         3.06

> ChromeOS measurements with the previous SPF patchset also showed
> significant reduction in page fault, mmap and munmap times. We do not
> have data on this new SPF proposal yet, though.
> 
> 
> I would like any feedback on the patchset, and most particularly about:
> - Has the complexity issue in previous SPF proposals been sufficiently
>   addressed ?
> - Are the performance benefits compelling enough ? I think the answer is
>   yes for the anon case, but maybe not as clear for the file cases.
> - Is the Android use case compelling enough to merge the entire patchset ?
> - Can we use this as a foundation for other mmap scalability work ?
>   I hear several proposals involving the idea of RCU based fault handling,
>   and hope this proposal might serve as a building block for these ?
> 
> 
> Michel Lespinasse (37):
>   mmap locking API: mmap_lock_is_contended returns a bool
>   mmap locking API: name the return values
>   do_anonymous_page: use update_mmu_tlb()
>   do_anonymous_page: reduce code duplication
>   mm: introduce CONFIG_SPECULATIVE_PAGE_FAULT
>   x86/mm: define ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT
>   mm: add FAULT_FLAG_SPECULATIVE flag
>   mm: add do_handle_mm_fault()
>   mm: add per-mm mmap sequence counter for speculative page fault handling.
>   mm: rcu safe vma freeing
>   x86/mm: attempt speculative mm faults first
>   mm: refactor __handle_mm_fault() / handle_pte_fault()
>   mm: implement speculative handling in __handle_mm_fault().
>   mm: add pte_map_lock() and pte_spinlock()
>   mm: implement speculative handling in do_anonymous_page()
>   mm: enable speculative fault handling through do_anonymous_page()
>   mm: implement speculative handling in do_numa_page()
>   mm: enable speculative fault handling in do_numa_page()
>   mm: implement speculative handling in wp_page_copy()
>   mm: implement and enable speculative fault handling in handle_pte_fault()
>   mm: implement speculative handling in do_swap_page()
>   mm: enable speculative fault handling through do_swap_page()
>   mm: rcu safe vma->vm_file freeing
>   mm: implement speculative handling in __do_fault()
>   mm: implement speculative handling in filemap_fault()
>   mm: implement speculative fault handling in finish_fault()
>   mm: implement speculative handling in do_fault_around()
>   mm: implement speculative handling in filemap_map_pages()
>   fs: list file types that support speculative faults.
>   mm: enable speculative fault handling for supported file types.
>   ext4: implement speculative fault handling
>   f2fs: implement speculative fault handling
>   mm: enable speculative fault handling only for multithreaded user space
>   mm: rcu safe vma freeing only for multithreaded user space
>   mm: spf statistics
>   arm64/mm: define ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT
>   arm64/mm: attempt speculative mm faults first
> 
>  arch/arm64/Kconfig            |   1 +
>  arch/arm64/mm/fault.c         |  52 +++
>  arch/x86/Kconfig              |   1 +
>  arch/x86/mm/fault.c           |  51 +++
>  fs/btrfs/file.c               |   1 +
>  fs/cifs/file.c                |   1 +
>  fs/exec.c                     |   1 +
>  fs/ext4/file.c                |   1 +
>  fs/ext4/inode.c               |   7 +-
>  fs/f2fs/file.c                |   8 +-
>  fs/fuse/file.c                |   1 +
>  fs/nfs/file.c                 |   1 +
>  fs/ubifs/file.c               |   1 +
>  fs/vboxsf/file.c              |   1 +
>  fs/xfs/xfs_file.c             |   3 +
>  include/linux/mm.h            |  76 +++-
>  include/linux/mm_types.h      |  20 +-
>  include/linux/mmap_lock.h     | 109 ++++--
>  include/linux/vm_event_item.h |  28 ++
>  include/linux/vmstat.h        |   6 +
>  kernel/fork.c                 |  26 +-
>  mm/Kconfig                    |  22 ++
>  mm/Kconfig.debug              |   7 +
>  mm/filemap.c                  |  73 +++-
>  mm/memory.c                   | 634 ++++++++++++++++++++++++----------
>  mm/mmap.c                     |  11 +-
>  mm/nommu.c                    |   6 +-
>  mm/vmstat.c                   |  28 ++
>  28 files changed, 942 insertions(+), 235 deletions(-)

Re: [RFC PATCH 00/37] Speculative page faults

[Axel Rasmussen]

First, I'm (ab?)using `git send-email` to reply to this thread, so apologies in
advance if I've messed up and the mail gets mangled in some way.

Here are some results comparing the "pft" microbenchmark from mmtests, running
on "large-ish" machines: one with a Skylake CPU, one with a Rome CPU. These
results are comparing Linus' v5.12 tag versus a 5.12 base with Michel's SPF
patchset.

The tests were run with the following mmtests configuration:

export PFT_ITERATIONS=30
export PFT_MAPPING_SIZE=$((MEMTOTAL_BYTES/5))
export PFT_MIN_CLIENTS=1
export PFT_MAX_CLIENTS=$NUMCPUS
export PFT_USE_PROCESSES=no
export PFT_PAGESIZES=base

To explain the result formatting a bit:

Higher numbers are better (so +% means a performance improvement vs. the v5.12
base kernel).

To be explicit about the output format: our internal testing framework parses
the output of pft, and generates this comparison table for the A/B test. In
pft's raw output, the columns are as follows:

- Gigabytes of RAM used
- Number of threads
- Number of cachelines
- User time
- Sys time
- Elapsed time
- Faults per sec per CPU
- Faults per sec

So the metrics in the test report, are called "pft_faults_{cpu,sec}_#". These
are aggregating the rows of output from the pft test:

- "cpu" means the result is faults per sec per CPU
- "sec' means the result is faults per sec
- The number corresponds to the "number of threads" column.

Note that pft runs the test multiple times for each threadcount. So, each row in
these reports is an aggregation of all of those runs for a particular thread
count.

To summarize the results:

On the Skylake machine the SPF patchset seems to provide a scalability
improvement across the board. With a small # of threads, the SPF patchset
outperforms the v5.12 base. As the number of threads grows, the gap diverges,
with SPF beating baseline by a larger and larger %.

On the Rome machine, however, SPF outperforms baseline with small numbers of
threads, but as the threadcount increases they *converge*. Eventually (between
79 and 110 threads), baseline wins out, and SPF actually gives us *less*
performance. I don't really have a clear explanation for this.



Okay, with all that said, here are the results:

Host: 2x Intel Skylake CPU, 28 cores / 56 threads each = 56 cores / 112 threads, 192 GiB RAM

[*] KERNELS
+-----------------+
| BASE KERNEL (A) |
+-----------------+
Kernel File: upstream-5-12.tar.xz

+-----------------+
| TEST KERNEL (B) |
+-----------------+
Kernel File: spf-5-12.tar.xz


[*] TAGS
             LABEL             |     VALUE
-------------------------------+-----------------
  kernel_version               | 5.12.0-smp-DEV
  kernel_version_major         | 5
  kernel_version_minor         | 12
  machine_platform_arch        | X86_64
  machine_platform_genus       | skylake
  machine_total_logical_cores  | 112
  machine_total_physical_cores | 56
  machine_total_ram_gib        | 192
  test_name                    | pft
  user                         | axelrasmussen

Note: values are delimited by colon (:)


[*] METRICS
        LABEL        | COUNT |       MIN       |       MAX        |          MEAN          |         MEDIAN         |       STDDEV       |   DIRECTION
---------------------+-------+-----------------+------------------+------------------------+------------------------+--------------------+----------------
  pft_faults_cpu_1   |       |                 |                  |                        |                        |                    |
  (A) 9f4ad9e425a1   | 30    | 565493.841      | 597051.859       | 574980.2721            | 570812.4335            | 8581.000516619562  |
  (B) b864a2166b52   | 30    | 564770.188      | 593162.85        | 582501.4053333333      | 587672.1510000001      | 10230.821799571824 |
                     |       | -0.13%          | -0.65%           | +1.31%                 | +2.95%                 | +19.23%            | <not defined>
  pft_faults_cpu_4   |       |                 |                  |                        |                        |                    |
  (A) 9f4ad9e425a1   | 30    | 511097.313      | 525778.068       | 519169.2665333333      | 518875.51300000004     | 3309.878510268415  |
  (B) b864a2166b52   | 30    | 522341.465      | 534768.283       | 528535.7364666668      | 529354.5875            | 2784.0796478571897 |
                     |       | +2.20%          | +1.71%           | +1.80%                 | +2.02%                 | -15.89%            | <not defined>
  pft_faults_cpu_7   |       |                 |                  |                        |                        |                    |
  (A) 9f4ad9e425a1   | 30    | 444047.293      | 477042.807       | 458029.40570000006     | 457146.5575            | 7141.073092774091  |
  (B) b864a2166b52   | 30    | 465624.007      | 501500.836       | 483791.1242666667      | 483134.7105            | 8256.428471156061  |
                     |       | +4.86%          | +5.13%           | +5.62%                 | +5.68%                 | +15.62%            | <not defined>
  pft_faults_cpu_12  |       |                 |                  |                        |                        |                    |
  (A) 9f4ad9e425a1   | 30    | 358661.222      | 434231.404       | 401799.73736666667     | 403513.576             | 18949.321891028267 |
  (B) b864a2166b52   | 30    | 418233.425      | 479956.806       | 451832.4433666666      | 455295.054             | 17026.783733301498 |
                     |       | +16.61%         | +10.53%          | +12.45%                | +12.83%                | -10.15%            | <not defined>
  pft_faults_cpu_21  |       |                 |                  |                        |                        |                    |
  (A) 9f4ad9e425a1   | 30    | 198339.171      | 258696.047       | 228804.68719999996     | 230395.9155            | 14085.607109196615 |
  (B) b864a2166b52   | 30    | 323446.812      | 384591.881       | 364176.7125666667      | 367052.1725            | 14414.08907027631  |
                     |       | +63.08%         | +48.67%          | +59.16%                | +59.31%                | +2.33%             | <not defined>
  pft_faults_cpu_30  |       |                 |                  |                        |                        |                    |
  (A) 9f4ad9e425a1   | 30    | 133771.268      | 162076.635       | 152097.81180000002     | 152233.40350000001     | 6269.9142812145465 |
  (B) b864a2166b52   | 30    | 179859.892      | 270190.89        | 243455.58066666668     | 242803.359             | 18445.098731373928 |
                     |       | +34.45%         | +66.71%          | +60.07%                | +59.49%                | +194.18%           | <not defined>
  pft_faults_cpu_48  |       |                 |                  |                        |                        |                    |
  (A) 9f4ad9e425a1   | 30    | 82579.061       | 104388.661       | 91568.5356333333       | 90592.1755             | 5546.777510223763  |
  (B) b864a2166b52   | 30    | 123542.341      | 171553.261       | 146579.92550000004     | 145360.7165            | 12601.231672937389 |
                     |       | +49.60%         | +64.34%          | +60.08%                | +60.46%                | +127.18%           | <not defined>
  pft_faults_cpu_79  |       |                 |                  |                        |                        |                    |
  (A) 9f4ad9e425a1   | 30    | 50894.891       | 59619.003        | 55129.4893             | 54661.8725             | 2458.8216885069032 |
  (B) b864a2166b52   | 30    | 91927.332       | 120933.559       | 102996.35123333332     | 102243.0855            | 7074.060753404679  |
                     |       | +80.62%         | +102.84%         | +86.83%                | +87.05%                | +187.70%           | <not defined>
  pft_faults_cpu_110 |       |                 |                  |                        |                        |                    |
  (A) 9f4ad9e425a1   | 30    | 31258.548       | 41685.942        | 36224.262500000004     | 36592.803              | 2680.4950001193283 |
  (B) b864a2166b52   | 30    | 74168.507       | 94616.572        | 82115.45999999999      | 81169.6525             | 4481.52286411527   |
                     |       | +137.27%        | +126.97%         | +126.69%               | +121.82%               | +67.19%            | <not defined>
  pft_faults_cpu_112 |       |                 |                  |                        |                        |                    |
  (A) 9f4ad9e425a1   | 30    | 31130.401       | 38908.904        | 35375.443100000004     | 35829.6035             | 2290.1349177377056 |
  (B) b864a2166b52   | 30    | 73258.73        | 92613.135        | 81351.41166666667      | 80899.55249999999      | 4220.631828597486  |
                     |       | +135.33%        | +138.03%         | +129.97%               | +125.79%               | +84.30%            | <not defined>
  pft_faults_sec_1   |       |                 |                  |                        |                        |                    |
  (A) 9f4ad9e425a1   | 30    | 564433.945      | 595277.365       | 573625.4990333333      | 569636.4879999999      | 8382.325888292982  |
  (B) b864a2166b52   | 30    | 563737.055      | 591576.036       | 580978.3862666666      | 586013.3670000001      | 9974.96387222383   |
                     |       | -0.12%          | -0.62%           | +1.28%                 | +2.87%                 | +19.00%            | <not defined>
  pft_faults_sec_4   |       |                 |                  |                        |                        |                    |
  (A) 9f4ad9e425a1   | 30    | 2.029701865e+06 | 2.089334274e+06  | 2.062801138933333e+06  | 2.059596098e+06        | 14075.442079268854 |
  (B) b864a2166b52   | 30    | 2.068478884e+06 | 2.12696578e+06   | 2.0998217110999995e+06 | 2.1048569074999997e+06 | 14703.254715627592 |
                     |       | +1.91%          | +1.80%           | +1.79%                 | +2.20%                 | +4.46%             | <not defined>
  pft_faults_sec_7   |       |                 |                  |                        |                        |                    |
  (A) 9f4ad9e425a1   | 30    | 3.072865342e+06 | 3.302000943e+06  | 3.169453882633334e+06  | 3.167175195e+06        | 50915.049503127535 |
  (B) b864a2166b52   | 30    | 3.123651261e+06 | 3.48522451e+06   | 3.3531759071666673e+06 | 3.351685131e+06        | 68012.57859696122  |
                     |       | +1.65%          | +5.55%           | +5.80%                 | +5.83%                 | +33.58%            | <not defined>
  pft_faults_sec_12  |       |                 |                  |                        |                        |                    |
  (A) 9f4ad9e425a1   | 30    | 4.215664312e+06 | 5.12743371e+06   | 4.703126739933333e+06  | 4.728185016e+06        | 240286.8825153738  |
  (B) b864a2166b52   | 30    | 4.968388093e+06 | 5.69411546e+06   | 5.359866512633331e+06  | 5.413731953e+06        | 207070.2801760229  |
                     |       | +17.86%         | +11.05%          | +13.96%                | +14.50%                | -13.82%            | <not defined>
  pft_faults_sec_21  |       |                 |                  |                        |                        |                    |
  (A) 9f4ad9e425a1   | 30    | 3.947870087e+06 | 5.151356879e+06  | 4.5692916812333325e+06 | 4.575656394e+06        | 287930.17681688163 |
  (B) b864a2166b52   | 30    | 6.631669322e+06 | 8.009437176e+06  | 7.552175649799999e+06  | 7.6175255265e+06       | 317684.09702681314 |
                     |       | +67.98%         | +55.48%          | +65.28%                | +66.48%                | +10.33%            | <not defined>
  pft_faults_sec_30  |       |                 |                  |                        |                        |                    |
  (A) 9f4ad9e425a1   | 30    | 3.789153013e+06 | 4.456429949e+06  | 4.1501704604999996e+06 | 4.139623102e+06        | 158198.37530642716 |
  (B) b864a2166b52   | 30    | 5.321981541e+06 | 7.794407019e+06  | 6.994074038533334e+06  | 7.011582908e+06        | 503444.05851691077 |
                     |       | +40.45%         | +74.90%          | +68.52%                | +69.38%                | +218.24%           | <not defined>
  pft_faults_sec_48  |       |                 |                  |                        |                        |                    |
  (A) 9f4ad9e425a1   | 30    | 3.496402856e+06 | 4.644547516e+06  | 3.820860616866667e+06  | 3.7869018389999997e+06 | 211076.70378028657 |
  (B) b864a2166b52   | 30    | 5.699219322e+06 | 7.20952334e+06   | 6.456858787866667e+06  | 6.41562651e+06         | 450973.69897164387 |
                     |       | +63.00%         | +55.23%          | +68.99%                | +69.42%                | +113.65%           | <not defined>
  pft_faults_sec_79  |       |                 |                  |                        |                        |                    |
  (A) 9f4ad9e425a1   | 30    | 3.479105285e+06 | 4.035012999e+06  | 3.7728950527e+06       | 3.730774097e+06        | 142408.19600171916 |
  (B) b864a2166b52   | 30    | 6.740820473e+06 | 8.557811658e+06  | 7.495920335099999e+06  | 7.4525865505e+06       | 458003.8944174562  |
                     |       | +93.75%         | +112.09%         | +98.68%                | +99.76%                | +221.61%           | <not defined>
  pft_faults_sec_110 |       |                 |                  |                        |                        |                    |
  (A) 9f4ad9e425a1   | 30    | 3.223198632e+06 | 4.134061429e+06  | 3.660475087133333e+06  | 3.7196672410000004e+06 | 250346.40765518686 |
  (B) b864a2166b52   | 30    | 7.766066553e+06 | 1.0045628577e+07 | 8.546153794033334e+06  | 8.481194604e+06        | 479152.6121881429  |
                     |       | +140.94%        | +143.00%         | +133.47%               | +128.01%               | +91.40%            | <not defined>
  pft_faults_sec_112 |       |                 |                  |                        |                        |                    |
  (A) 9f4ad9e425a1   | 30    | 3.208729058e+06 | 3.960855868e+06  | 3.627510960199999e+06  | 3.6704841215000004e+06 | 228364.6649597633  |
  (B) b864a2166b52   | 30    | 7.697393128e+06 | 9.643206206e+06  | 8.579052920500001e+06  | 8.4982216315e+06       | 429771.9693968675  |
                     |       | +139.89%        | +143.46%         | +136.50%               | +131.53%               | +88.20%            | <not defined>


============================================================================================================================================================


Host: 2x AMD Rome CPU, 64 cores / 128 threads each = 128 cores / 256 threads, 1 TiB RAM

[*] KERNELS
+-----------------+
| BASE KERNEL (A) |
+-----------------+
Kernel File: upstream-5-12.tar.xz

+-----------------+
| TEST KERNEL (B) |
+-----------------+
Kernel File: spf-5-12.tar.xz


[*] TAGS
             LABEL             |     VALUE
-------------------------------+-----------------
  kernel_version               | 5.12.0-smp-DEV
  kernel_version_major         | 5
  kernel_version_minor         | 12
  machine_platform_arch        | X86_64
  machine_platform_genus       | rome
  machine_total_logical_cores  | 256
  machine_total_physical_cores | 128
  machine_total_ram_gib        | 1024
  test_name                    | pft
  user                         | axelrasmussen

Note: values are delimited by colon (:)


[*] METRICS
        LABEL        | COUNT |       MIN       |       MAX        |          MEAN          |         MEDIAN         |         STDDEV         |   DIRECTION
---------------------+-------+-----------------+------------------+------------------------+------------------------+------------------------+----------------
  pft_faults_cpu_1   |       |                 |                  |                        |                        |                        |
  (A) 9f4ad9e425a1   | 30    | 1.322299227e+06 | 1.350579319e+06  | 1.3360688650999998e+06 | 1.332799986e+06        | 8036.2199341743535     |
  (B) b864a2166b52   | 30    | 1.315533425e+06 | 1.335456188e+06  | 1.3275440968000002e+06 | 1.3296407555e+06       | 6298.976910285278      |
                     |       | -0.51%          | -1.12%           | -0.64%                 | -0.24%                 | -21.62%                | <not defined>
  pft_faults_cpu_4   |       |                 |                  |                        |                        |                        |
  (A) 9f4ad9e425a1   | 30    | 599753.078      | 835196.831       | 785973.1949666667      | 818552.9575            | 71177.98344956583      |
  (B) b864a2166b52   | 30    | 1.033135922e+06 | 1.069290557e+06  | 1.0482872088333336e+06 | 1.0468814775e+06       | 10779.7490408502       |
                     |       | +72.26%         | +28.03%          | +33.37%                | +27.89%                | -84.86%                | <not defined>
  pft_faults_cpu_7   |       |                 |                  |                        |                        |                        |
  (A) 9f4ad9e425a1   | 30    | 347767.594      | 582284.169       | 508009.3081            | 532618.8404999999      | 76179.64543982298      |
  (B) b864a2166b52   | 30    | 876652.745      | 963373.111       | 928708.5755333335      | 933480.6370000001      | 22305.420182136346     |
                     |       | +152.08%        | +65.45%          | +82.81%                | +75.26%                | -70.72%                | <not defined>
  pft_faults_cpu_12  |       |                 |                  |                        |                        |                        |
  (A) 9f4ad9e425a1   | 30    | 220799.208      | 305899.445       | 280923.0221            | 286852.4555            | 19497.416638332666     |
  (B) b864a2166b52   | 30    | 339602.001      | 531225.324       | 468710.86046666675     | 505322.6055            | 63089.14230805185      |
                     |       | +53.81%         | +73.66%          | +66.85%                | +76.16%                | +223.58%               | <not defined>
  pft_faults_cpu_21  |       |                 |                  |                        |                        |                        |
  (A) 9f4ad9e425a1   | 30    | 127237.472      | 213103.883       | 171006.9222            | 186122.27850000001     | 28325.93727251356      |
  (B) b864a2166b52   | 30    | 171981.459      | 239555.654       | 208386.11153333331     | 219433.95549999998     | 21608.36313357416      |
                     |       | +35.17%         | +12.41%          | +21.86%                | +17.90%                | -23.72%                | <not defined>
  pft_faults_cpu_30  |       |                 |                  |                        |                        |                        |
  (A) 9f4ad9e425a1   | 30    | 98673.026       | 217605.193       | 165832.00136666666     | 181021.78100000002     | 37277.826073472075     |
  (B) b864a2166b52   | 30    | 124005.714      | 221043.49        | 186948.93826666664     | 203430.498             | 28825.232853924826     |
                     |       | +25.67%         | +1.58%           | +12.73%                | +12.38%                | -22.67%                | <not defined>
  pft_faults_cpu_48  |       |                 |                  |                        |                        |                        |
  (A) 9f4ad9e425a1   | 30    | 88635.374       | 201202.155       | 164099.58250000002     | 178427.289             | 31615.465775759487     |
  (B) b864a2166b52   | 30    | 103850.066      | 198347.633       | 165546.73610000004     | 189675.25900000002     | 33104.97333224132      |
                     |       | +17.17%         | -1.42%           | +0.88%                 | +6.30%                 | +4.71%                 | <not defined>
  pft_faults_cpu_79  |       |                 |                  |                        |                        |                        |
  (A) 9f4ad9e425a1   | 30    | 81102.261       | 89112.314        | 83463.4302             | 83469.707              | 1869.7214449321116     |
  (B) b864a2166b52   | 30    | 83875.566       | 94160.682        | 91835.6409             | 92396.381              | 2578.3539781233358     |
                     |       | +3.42%          | +5.67%           | +10.03%                | +10.69%                | +37.90%                | <not defined>
  pft_faults_cpu_110 |       |                 |                  |                        |                        |                        |
  (A) 9f4ad9e425a1   | 30    | 77305.793       | 83501.445        | 81548.62710000001      | 81830.84099999999      | 1372.4842285878892     |
  (B) b864a2166b52   | 30    | 76212.241       | 78931.508        | 78123.50329999998      | 78462.183              | 762.927436545318       |
                     |       | -1.41%          | -5.47%           | -4.20%                 | -4.12%                 | -44.41%                | <not defined>
  pft_faults_cpu_128 |       |                 |                  |                        |                        |                        |
  (A) 9f4ad9e425a1   | 30    | 75343.922       | 82741.042        | 80366.33486666666      | 80530.75899999999      | 1430.3656765353558     |
  (B) b864a2166b52   | 30    | 72095.698       | 74123.908        | 73297.6984             | 73425.3245             | 571.842103541272       |
                     |       | -4.31%          | -10.41%          | -8.80%                 | -8.82%                 | -60.02%                | <not defined>
  pft_faults_sec_1   |       |                 |                  |                        |                        |                        |
  (A) 9f4ad9e425a1   | 30    | 1.317050628e+06 | 1.345243569e+06  | 1.3311298687999998e+06 | 1.3281300295000002e+06 | 8035.465831526684      |
  (B) b864a2166b52   | 30    | 1.311461655e+06 | 1.330935614e+06  | 1.3231212217333335e+06 | 1.3250745915e+06       | 6193.445975030056      |
                     |       | -0.42%          | -1.06%           | -0.60%                 | -0.23%                 | -22.92%                | <not defined>
  pft_faults_sec_4   |       |                 |                  |                        |                        |                        |
  (A) 9f4ad9e425a1   | 30    | 2.389687474e+06 | 3.327314892e+06  | 3.1228356446666666e+06 | 3.2612643784999996e+06 | 289852.17947539146     |
  (B) b864a2166b52   | 30    | 4.102518552e+06 | 4.250608035e+06  | 4.1639243518333333e+06 | 4.157235491e+06        | 41878.60201517858      |
                     |       | +71.68%         | +27.75%          | +33.34%                | +27.47%                | -85.55%                | <not defined>
  pft_faults_sec_7   |       |                 |                  |                        |                        |                        |
  (A) 9f4ad9e425a1   | 30    | 2.414012583e+06 | 4.032415905e+06  | 3.5188523367000003e+06 | 3.6881281375e+06       | 524652.8315124605      |
  (B) b864a2166b52   | 30    | 5.959160786e+06 | 6.580231542e+06  | 6.329055505566668e+06  | 6.3639131035e+06       | 147685.48556391377     |
                     |       | +146.86%        | +63.18%          | +79.86%                | +72.55%                | -71.85%                | <not defined>
  pft_faults_sec_12  |       |                 |                  |                        |                        |                        |
  (A) 9f4ad9e425a1   | 30    | 2.636643985e+06 | 3.648873092e+06  | 3.352667637600001e+06  | 3.4238721715e+06       | 231685.81558700278     |
  (B) b864a2166b52   | 30    | 3.95869994e+06  | 6.222621801e+06  | 5.5047526395666655e+06 | 5.925404714e+06        | 728923.8441016441      |
                     |       | +50.14%         | +70.54%          | +64.19%                | +73.06%                | +214.62%               | <not defined>
  pft_faults_sec_21  |       |                 |                  |                        |                        |                        |
  (A) 9f4ad9e425a1   | 30    | 2.659931432e+06 | 4.417172596e+06  | 3.5592916604333334e+06 | 3.8707699085e+06       | 581152.2296007784      |
  (B) b864a2166b52   | 30    | 3.550370032e+06 | 4.92603416e+06   | 4.2723118866e+06       | 4.490487737e+06        | 438423.4518313975      |
                     |       | +33.48%         | +11.52%          | +20.03%                | +16.01%                | -24.56%                | <not defined>
  pft_faults_sec_30  |       |                 |                  |                        |                        |                        |
  (A) 9f4ad9e425a1   | 30    | 2.946083199e+06 | 6.423331347e+06  | 4.914002587066667e+06  | 5.3587292535e+06       | 1.0898160729269844e+06 |
  (B) b864a2166b52   | 30    | 3.64123808e+06  | 6.532025228e+06  | 5.492737309800002e+06  | 5.97391926e+06         | 843563.7696236438      |
                     |       | +23.60%         | +1.69%           | +11.78%                | +11.48%                | -22.60%                | <not defined>
  pft_faults_sec_48  |       |                 |                  |                        |                        |                        |
  (A) 9f4ad9e425a1   | 30    | 4.214980049e+06 | 9.528581084e+06  | 7.7757277348e+06       | 8.448662988499999e+06  | 1.4883900190462691e+06 |
  (B) b864a2166b52   | 30    | 4.84579977e+06  | 9.330363688e+06  | 7.751113585633334e+06  | 8.8988808295e+06       | 1.5801553180324829e+06 |
                     |       | +14.97%         | -2.08%           | -0.32%                 | +5.33%                 | +6.17%                 | <not defined>
  pft_faults_sec_79  |       |                 |                  |                        |                        |                        |
  (A) 9f4ad9e425a1   | 30    | 6.348996215e+06 | 6.985977576e+06  | 6.533078342966668e+06  | 6.5315793925e+06       | 151519.46530198734     |
  (B) b864a2166b52   | 30    | 6.484637033e+06 | 7.169593031e+06  | 6.984747101799999e+06  | 7.004222881e+06        | 164329.43630222118     |
                     |       | +2.14%          | +2.63%           | +6.91%                 | +7.24%                 | +8.45%                 | <not defined>
  pft_faults_sec_110 |       |                 |                  |                        |                        |                        |
  (A) 9f4ad9e425a1   | 30    | 7.880294448e+06 | 9.09788171e+06   | 8.874888452533334e+06  | 8.9250222115e+06       | 218417.912935066       |
  (B) b864a2166b52   | 30    | 7.887984615e+06 | 8.408191775e+06  | 8.3027231049666675e+06 | 8.3457714105e+06       | 104353.66169193448     |
                     |       | +0.10%          | -7.58%           | -6.45%                 | -6.49%                 | -52.22%                | <not defined>
  pft_faults_sec_128 |       |                 |                  |                        |                        |                        |
  (A) 9f4ad9e425a1   | 30    | 8.659779012e+06 | 1.0498137566e+07 | 1.01219317397e+07      | 1.0153906594999999e+07 | 329224.7320975063      |
  (B) b864a2166b52   | 30    | 8.906613971e+06 | 9.256002835e+06  | 9.113201005133333e+06  | 9.114904465e+06        | 96222.63922675727      |
                     |       | +2.85%          | -11.83%          | -9.97%                 | -10.23%                | -70.77%                | <not defined>


============================================================================================================================================================


CPU cache info (getconf -a | grep CACHE):

Rome:
LEVEL1_ICACHE_SIZE 32768
LEVEL1_ICACHE_ASSOC 8
LEVEL1_ICACHE_LINESIZE 64
LEVEL1_DCACHE_SIZE 32768
LEVEL1_DCACHE_ASSOC 8
LEVEL1_DCACHE_LINESIZE 64
LEVEL2_CACHE_SIZE 524288
LEVEL2_CACHE_ASSOC 8
LEVEL2_CACHE_LINESIZE 64
LEVEL3_CACHE_SIZE 268435456
LEVEL3_CACHE_ASSOC 0
LEVEL3_CACHE_LINESIZE 64
LEVEL4_CACHE_SIZE 0
LEVEL4_CACHE_ASSOC 0
LEVEL4_CACHE_LINESIZE 0

Skylake:
LEVEL1_ICACHE_SIZE 32768
LEVEL1_ICACHE_ASSOC 8
LEVEL1_ICACHE_LINESIZE 64
LEVEL1_DCACHE_SIZE 32768
LEVEL1_DCACHE_ASSOC 8
LEVEL1_DCACHE_LINESIZE 64
LEVEL2_CACHE_SIZE 1048576
LEVEL2_CACHE_ASSOC 16
LEVEL2_CACHE_LINESIZE 64
LEVEL3_CACHE_SIZE 40370176
LEVEL3_CACHE_ASSOC 11
LEVEL3_CACHE_LINESIZE 64
LEVEL4_CACHE_SIZE 0
LEVEL4_CACHE_ASSOC 0
LEVEL4_CACHE_LINESIZE 0

Re: [RFC PATCH 00/37] Speculative page faults

[vjitta]

From: Vijayanand Jitta <vjitta@codeaurora.org>

We have tried out the SPF patch series on our code base
and have seen significant improvements in app launch
latency and ebizzy tests. Please find the results below.

App launch latency (in ms) :

Apps		w/o spf	     with spf	  % improvement
--------------------------------------------------------
Changba		1531	     1252	   18.2
Taobao		1813	     1506	   16.9
QQlive		1966	     1775	   9.7


Ebizzy test (ebizzy_64  -mRTt 8) : 

ebizzy_64  -mRTt 8	w/o spf	    with spf	% improvement
--------------------------------------------------------------
Avg_records_count	2455	    2717	10.7
Avg_real_time		10	    10		-
Avg_user_time		0.74	    0.66	10.8
Avg_sys_time		12.2	    11.6	4.9

So, getting this series mainlined would be of great help.

Thanks,
Vijay
-- 
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